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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">The effects of yoga on shoulder and spinal actions for women with breast cancer-related lymphoedema of the arm: A randomised controlled pilot study</title><author><name sortKey="Loudon, Annette" sort="Loudon, Annette" uniqKey="Loudon A" first="Annette" last="Loudon">Annette Loudon</name><affiliation><nlm:aff id="Aff1">Centre for Rural Health, University of Tasmania, Launceston, Tasmania 7250 Australia</nlm:aff></affiliation></author><author><name sortKey="Barnett, Tony" sort="Barnett, Tony" uniqKey="Barnett T" first="Tony" last="Barnett">Tony Barnett</name><affiliation><nlm:aff id="Aff1">Centre for Rural Health, University of Tasmania, Launceston, Tasmania 7250 Australia</nlm:aff></affiliation></author><author><name sortKey="Piller, Neil" sort="Piller, Neil" uniqKey="Piller N" first="Neil" last="Piller">Neil Piller</name><affiliation><nlm:aff id="Aff2">Department of Surgery, School of Medicine, Flinders University, Adelaide, South Australia 5042 Australia</nlm:aff></affiliation></author><author><name sortKey="Immink, Maarten A" sort="Immink, Maarten A" uniqKey="Immink M" first="Maarten A." last="Immink">Maarten A. Immink</name><affiliation><nlm:aff id="Aff3">School of Health Sciences, University of South Australia, Adelaide, South Australia 5000 Australia</nlm:aff></affiliation></author><author><name sortKey="Visentin, Denis" sort="Visentin, Denis" uniqKey="Visentin D" first="Denis" last="Visentin">Denis Visentin</name><affiliation><nlm:aff id="Aff4">School of Health Sciences, University of Tasmania, Locked Bag 1322, Launceston, TAS 7250 Australia</nlm:aff></affiliation></author><author><name sortKey="Williams, Andrew D" sort="Williams, Andrew D" uniqKey="Williams A" first="Andrew D." last="Williams">Andrew D. Williams</name><affiliation><nlm:aff id="Aff4">School of Health Sciences, University of Tasmania, Locked Bag 1322, Launceston, TAS 7250 Australia</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">27590865</idno><idno type="pmc">5010718</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5010718</idno><idno type="RBID">PMC:5010718</idno><idno type="doi">10.1186/s12906-016-1330-7</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">000C52</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000C52</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">The effects of yoga on shoulder and spinal actions for women with breast cancer-related lymphoedema of the arm: A randomised controlled pilot study</title><author><name sortKey="Loudon, Annette" sort="Loudon, Annette" uniqKey="Loudon A" first="Annette" last="Loudon">Annette Loudon</name><affiliation><nlm:aff id="Aff1">Centre for Rural Health, University of Tasmania, Launceston, Tasmania 7250 Australia</nlm:aff></affiliation></author><author><name sortKey="Barnett, Tony" sort="Barnett, Tony" uniqKey="Barnett T" first="Tony" last="Barnett">Tony Barnett</name><affiliation><nlm:aff id="Aff1">Centre for Rural Health, University of Tasmania, Launceston, Tasmania 7250 Australia</nlm:aff></affiliation></author><author><name sortKey="Piller, Neil" sort="Piller, Neil" uniqKey="Piller N" first="Neil" last="Piller">Neil Piller</name><affiliation><nlm:aff id="Aff2">Department of Surgery, School of Medicine, Flinders University, Adelaide, South Australia 5042 Australia</nlm:aff></affiliation></author><author><name sortKey="Immink, Maarten A" sort="Immink, Maarten A" uniqKey="Immink M" first="Maarten A." last="Immink">Maarten A. Immink</name><affiliation><nlm:aff id="Aff3">School of Health Sciences, University of South Australia, Adelaide, South Australia 5000 Australia</nlm:aff></affiliation></author><author><name sortKey="Visentin, Denis" sort="Visentin, Denis" uniqKey="Visentin D" first="Denis" last="Visentin">Denis Visentin</name><affiliation><nlm:aff id="Aff4">School of Health Sciences, University of Tasmania, Locked Bag 1322, Launceston, TAS 7250 Australia</nlm:aff></affiliation></author><author><name sortKey="Williams, Andrew D" sort="Williams, Andrew D" uniqKey="Williams A" first="Andrew D." last="Williams">Andrew D. Williams</name><affiliation><nlm:aff id="Aff4">School of Health Sciences, University of Tasmania, Locked Bag 1322, Launceston, TAS 7250 Australia</nlm:aff></affiliation></author></analytic><series><title level="j">BMC Complementary and Alternative Medicine</title><idno type="eISSN">1472-6882</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>We aimed to evaluate the effect of an 8-week yoga intervention on the shoulder and spinal actions of women with breast cancer-related arm lymphoedema.</p></sec><sec><title>Method</title><p>A randomised controlled pilot trial. The intervention group (<italic>n</italic> = 12) completed eight weeks of daily yoga sessions while the control group (<italic>n</italic> = 11) continued with best current care including information on compression sleeves, skin care, risks of temperature variations and recommended safe use of affected arm. Lumbo-pelvic posture, range of motion (ROM) in the shoulder and spine, and strength in shoulder and pectoral major and minor, and serratus anterior were taken at baseline, week 8 and after a 4-week follow-up. Outcome assessors were blinded to allocation.</p></sec><sec><title>Results</title><p>At week eight the intervention group had an improvement in lumbo-pelvic posture, as indicated by a reduction in pelvic obliquity compared to the control group (mean difference = −8.39°, 95 % CI: −15.64 to −1.13°, <italic>p</italic> = 0.023). A secondary finding was that strength in shoulder abduction significantly increased following the yoga intervention in both the affected (9.5 kg; CI: 0.34 to 18.66, <italic>p</italic> = 0.042) and non-affected arm (11.58 kg; CI: 0.25 to 22.91; <italic>p</italic> = 0.045). There were no significant between group changes in any ROM measures as a result of the yoga intervention.</p></sec><sec><title>Conclusion</title><p>This pilot study demonstrates that participation in yoga may provide benefits for posture and strength in women with Breast Cancer Related Lymphoedema. The improvements may be attributed to the focus of yoga on overall postural and functional movement patterns. Further trials with longer intervention that follow this methodology are warranted.</p></sec><sec><title>Trial registration</title><p>The Australian New Zealand Clinical Trials Registry <ext-link ext-link-type="uri" xlink:href="http://www.anzctr.org.au/TrialSearch.aspx?searchTxt=12611000202965&isBasic=True">ACTRN12611000202965</ext-link>.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Brennan, Mj" uniqKey="Brennan M">MJ Brennan</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Hayes, Sc" uniqKey="Hayes S">SC Hayes</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Pyszel, A" uniqKey="Pyszel A">A Pyszel</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Balzarini, A" uniqKey="Balzarini A">A Balzarini</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Shamley, D" uniqKey="Shamley D">D Shamley</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Thomas Maclean, R" uniqKey="Thomas Maclean R">R Thomas-MacLean</name></author><author><name sortKey="Miedema, B" uniqKey="Miedema B">B Miedema</name></author><author><name sortKey="Tatemichi, Sr" uniqKey="Tatemichi S">SR Tatemichi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Dawes, Dj" uniqKey="Dawes D">DJ Dawes</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Mcclure, Mk" uniqKey="Mcclure M">MK McClure</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Schmitz, Kh" uniqKey="Schmitz K">KH Schmitz</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Hayes, Sc" uniqKey="Hayes S">SC Hayes</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Desikachar, K" uniqKey="Desikachar K">K Desikachar</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Evans, S" uniqKey="Evans S">S Evans</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Posadzki, P" uniqKey="Posadzki P">P Posadzki</name></author><author><name sortKey="Parekh, S" uniqKey="Parekh S">S Parekh</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Schrale, G" uniqKey="Schrale G">G Schrale</name></author><author><name sortKey="Ryan, Tj" uniqKey="Ryan T">TJ Ryan</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Loudon, A" uniqKey="Loudon A">A Loudon</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Loudon, A" uniqKey="Loudon A">A Loudon</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Schmitz, Kh" uniqKey="Schmitz K">KH Schmitz</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Johansson, K" uniqKey="Johansson K">K Johansson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Saraswati, N" uniqKey="Saraswati N">N Saraswati</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Casley Smith, Jr" uniqKey="Casley Smith J">JR Casley-Smith</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Loudon, A" uniqKey="Loudon A">A Loudon</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Box, Rc" uniqKey="Box R">RC Box</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Riddle, Dl" uniqKey="Riddle D">DL Riddle</name></author><author><name sortKey="Rothstein, Jm" uniqKey="Rothstein J">JM Rothstein</name></author><author><name sortKey="Lamb, Rl" uniqKey="Lamb R">RL Lamb</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kendall, Fp" uniqKey="Kendall F">FP Kendall</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Leggin, Bg" uniqKey="Leggin B">BG Leggin</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Bohannon, Rw" uniqKey="Bohannon R">RW Bohannon</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Menegoni, F" uniqKey="Menegoni F">F Menegoni</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Malicka, I" uniqKey="Malicka I">I Malicka</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Aggithaya, Mg" uniqKey="Aggithaya M">MG Aggithaya</name></author><author><name sortKey="Narahari, Sr" uniqKey="Narahari S">SR Narahari</name></author><author><name sortKey="Ryan, Tj" uniqKey="Ryan T">TJ Ryan</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Byrne, Je" uniqKey="Byrne J">JE Byrne</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Greendale, Ga" uniqKey="Greendale G">GA Greendale</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kaji, A" uniqKey="Kaji A">A Kaji</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Emery, K" uniqKey="Emery K">K Emery</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Mandanmohan, Jl" uniqKey="Mandanmohan J">JL Mandanmohan</name></author><author><name sortKey="Udupa, K" uniqKey="Udupa K">K Udupa</name></author><author><name sortKey="Bhavanani, Ab" uniqKey="Bhavanani A">AB Bhavanani</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lin, Jj" uniqKey="Lin J">JJ Lin</name></author><author><name sortKey="Lim, Hk" uniqKey="Lim H">HK Lim</name></author><author><name sortKey="Yang, Jl" uniqKey="Yang J">JL Yang</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Shamley, Dr" uniqKey="Shamley D">DR Shamley</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kibler, Wb" uniqKey="Kibler W">WB Kibler</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lee, Sa" uniqKey="Lee S">SA Lee</name></author></analytic></biblStruct></listBibl></div1></back></TEI><pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">BMC Complement Altern Med</journal-id><journal-id journal-id-type="iso-abbrev">BMC Complement Altern Med</journal-id><journal-title-group><journal-title>BMC Complementary and Alternative Medicine</journal-title></journal-title-group><issn pub-type="epub">1472-6882</issn><publisher><publisher-name>BioMed Central</publisher-name><publisher-loc>London</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">27590865</article-id><article-id pub-id-type="pmc">5010718</article-id><article-id pub-id-type="publisher-id">1330</article-id><article-id pub-id-type="doi">10.1186/s12906-016-1330-7</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title>The effects of yoga on shoulder and spinal actions for women with breast cancer-related lymphoedema of the arm: A randomised controlled pilot study</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Loudon</surname><given-names>Annette</given-names></name><address><email>forestmy@hotmail.com</email></address><xref ref-type="aff" rid="Aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Barnett</surname><given-names>Tony</given-names></name><address><email>Tony.Barnett@utas.edu.au</email></address><xref ref-type="aff" rid="Aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Piller</surname><given-names>Neil</given-names></name><address><email>neil.piller@flinders.edu.au</email></address><xref ref-type="aff" rid="Aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>Immink</surname><given-names>Maarten A.</given-names></name><address><email>Maarten.Immink@unisa.edu.au</email></address><xref ref-type="aff" rid="Aff3">3</xref></contrib><contrib contrib-type="author"><name><surname>Visentin</surname><given-names>Denis</given-names></name><address><email>Denis.Visentin@utas.edu.au</email></address><xref ref-type="aff" rid="Aff4">4</xref></contrib><contrib contrib-type="author" corresp="yes"><name><surname>Williams</surname><given-names>Andrew D.</given-names></name><address><email>Andrew.Williams@utas.edu.au</email></address><xref ref-type="aff" rid="Aff4">4</xref></contrib><aff id="Aff1"><label>1</label>Centre for Rural Health, University of Tasmania, Launceston, Tasmania 7250 Australia</aff><aff id="Aff2"><label>2</label>Department of Surgery, School of Medicine, Flinders University, Adelaide, South Australia 5042 Australia</aff><aff id="Aff3"><label>3</label>School of Health Sciences, University of South Australia, Adelaide, South Australia 5000 Australia</aff><aff id="Aff4"><label>4</label>School of Health Sciences, University of Tasmania, Locked Bag 1322, Launceston, TAS 7250 Australia</aff></contrib-group><pub-date pub-type="epub"><day>2</day><month>9</month><year>2016</year></pub-date><pub-date pub-type="pmc-release"><day>2</day><month>9</month><year>2016</year></pub-date><pub-date pub-type="collection"><year>2016</year></pub-date><volume>16</volume><issue>1</issue><elocation-id>343</elocation-id><history><date date-type="received"><day>22</day><month>12</month><year>2015</year></date><date date-type="accepted"><day>27</day><month>8</month><year>2016</year></date></history><permissions><copyright-statement>© The Author(s). 2016</copyright-statement><license license-type="OpenAccess"><license-p><bold>Open Access</bold>This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">http://creativecommons.org/licenses/by/4.0/</ext-link>), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/publicdomain/zero/1.0/">http://creativecommons.org/publicdomain/zero/1.0/</ext-link>) applies to the data made available in this article, unless otherwise stated.</license-p></license></permissions><abstract id="Abs1"><sec><title>Background</title><p>We aimed to evaluate the effect of an 8-week yoga intervention on the shoulder and spinal actions of women with breast cancer-related arm lymphoedema.</p></sec><sec><title>Method</title><p>A randomised controlled pilot trial. The intervention group (<italic>n</italic> = 12) completed eight weeks of daily yoga sessions while the control group (<italic>n</italic> = 11) continued with best current care including information on compression sleeves, skin care, risks of temperature variations and recommended safe use of affected arm. Lumbo-pelvic posture, range of motion (ROM) in the shoulder and spine, and strength in shoulder and pectoral major and minor, and serratus anterior were taken at baseline, week 8 and after a 4-week follow-up. Outcome assessors were blinded to allocation.</p></sec><sec><title>Results</title><p>At week eight the intervention group had an improvement in lumbo-pelvic posture, as indicated by a reduction in pelvic obliquity compared to the control group (mean difference = −8.39°, 95 % CI: −15.64 to −1.13°, <italic>p</italic> = 0.023). A secondary finding was that strength in shoulder abduction significantly increased following the yoga intervention in both the affected (9.5 kg; CI: 0.34 to 18.66, <italic>p</italic> = 0.042) and non-affected arm (11.58 kg; CI: 0.25 to 22.91; <italic>p</italic> = 0.045). There were no significant between group changes in any ROM measures as a result of the yoga intervention.</p></sec><sec><title>Conclusion</title><p>This pilot study demonstrates that participation in yoga may provide benefits for posture and strength in women with Breast Cancer Related Lymphoedema. The improvements may be attributed to the focus of yoga on overall postural and functional movement patterns. Further trials with longer intervention that follow this methodology are warranted.</p></sec><sec><title>Trial registration</title><p>The Australian New Zealand Clinical Trials Registry <ext-link ext-link-type="uri" xlink:href="http://www.anzctr.org.au/TrialSearch.aspx?searchTxt=12611000202965&isBasic=True">ACTRN12611000202965</ext-link>.</p></sec></abstract><kwd-group xml:lang="en"><title>Keywords</title><kwd>Yoga</kwd><kwd>Arm lymphoedema</kwd><kwd>Breast cancer</kwd><kwd>Range of motion</kwd><kwd>Strength testing</kwd></kwd-group><funding-group><award-group><funding-source><institution>Swan Research Institute</institution></funding-source></award-group><award-group><funding-source><institution>Faculty of Health Sciences, University of Tasmania</institution></funding-source></award-group></funding-group><custom-meta-group><custom-meta><meta-name>issue-copyright-statement</meta-name><meta-value>© The Author(s) 2016</meta-value></custom-meta></custom-meta-group></article-meta></front><body><sec id="Sec1"><title>Background</title><p>In spite of improvements to surgery and radiation treatment, breast cancer-related lymphoedema (BCRL) continues to affect at least 20 % of women undergoing breast cancer treatment with axillary clearance [<xref ref-type="bibr" rid="CR1">1</xref>]. As a chronic condition, lymphoedema requires life-long management to prevent the condition worsening and occurrence of infections such as cellulitis [<xref ref-type="bibr" rid="CR2">2</xref>].</p><p>Upper body impairment is common in women with BCRL, whose reduction in functional activity can be higher than in women who have had breast cancer treatment without lymphoedema [<xref ref-type="bibr" rid="CR3">3</xref>]. Impairment of the affected arm is evident in loss of shoulder range of motion (ROM) and strength [<xref ref-type="bibr" rid="CR4">4</xref>] and changed bio-mechanics of the shoulder girdle, all leading to loss of symmetry between sides [<xref ref-type="bibr" rid="CR5">5</xref>, <xref ref-type="bibr" rid="CR6">6</xref>]. These constraints produce difficulty with daily activities including household chores, driving, hobbies, carrying items and activities which require fine motor coordination of the hand [<xref ref-type="bibr" rid="CR7">7</xref>]. Limitation of activity and level of pain have been associated with lower quality of life (QOL) [<xref ref-type="bibr" rid="CR8">8</xref>]. Exercise interventions for women with BCRL have resulted in increased shoulder ROM [<xref ref-type="bibr" rid="CR9">9</xref>], strength [<xref ref-type="bibr" rid="CR10">10</xref>] and improved QOL [<xref ref-type="bibr" rid="CR9">9</xref>], indicating that physical therapies may improve upper body morbidity [<xref ref-type="bibr" rid="CR11">11</xref>].</p><p>Yoga is an integrated system that consists of breathing (pranayama), postures (asana), meditation and relaxation designed to improve the biopsychosocial functioning of an individual, irrespective of their limitations [<xref ref-type="bibr" rid="CR12">12</xref>]. Improvements in physical flexibility, strength, neuro-motor coordination and postural alignment in a range of populations have been reported [<xref ref-type="bibr" rid="CR13">13</xref>]. For this reason, yoga has been recommended as an adjunct to physiotherapy in a rehabilitation setting [<xref ref-type="bibr" rid="CR14">14</xref>] including for those with lymphoedema [<xref ref-type="bibr" rid="CR15">15</xref>] and may assist in correcting the upper body impairment frequently experienced by women with BCRL. However, currently the authors are unaware of any published research on the effect of yoga on posture, shoulder and spinal ROM and shoulder strength in women with BCRL.</p><p>The objective of this pilot trial was to obtain preliminary data to evaluate the effects of an 8-week yoga intervention on the upper body of women with stage one BCRL. This paper reports on outcomes of postural alignment, ROM of the shoulder and spine, and strength of the shoulder and other muscles affected by breast cancer surgery and treatment, i.e. pectoralis major, pectoralis minor and serratus anterior.</p></sec><sec id="Sec2"><title>Methods</title><sec id="Sec3"><title>Study design</title><p>The trial was a multicentre parallel randomised controlled pilot trial (RCT) (Australian New Zealand Clinical Trials Registration ACTRN12611000202965). Ethics approval was granted by University of Tasmania Social Sciences Human Research Ethics Committee (H00011534).</p><p>The study was part of a larger study. The full protocol has been described previously [<xref ref-type="bibr" rid="CR16">16</xref>] and the primary outcomes for the effects of yoga on lymphoedema and its sequelae and QOL have been published [<xref ref-type="bibr" rid="CR17">17</xref>]. This manuscript presents the results for the secondary outcome measures of shoulder and spinal ROM and shoulder strength. Outcome measurements were performed at baseline, week 8 (on completion of intervention) and at week 12 (one month after intervention). Group allocation was conducted by a person independent of the trial using a computer-generated random number system on a 1:1 allocation ratio to intervention or control group. Notification of group allocation in sequentially numbered opaque sealed envelopes occurred after the baseline measurements. None of the assessors were involved in either the allocation or the delivery of the intervention. Participants were asked not to divulge their treatment to assessors and assessors did not have access to previous results.</p><sec id="Sec4"><title>Sample size calculation</title><p>A preliminary sample size calculation indicated that to detect a clinically significant increase in shoulder ROM of at least 10° between the two groups with expected within-group-differences of 10 % of the mean with 80 % power, so that 13–18 participants would be required for each group.</p></sec></sec><sec id="Sec5"><title>Participants</title><p>Women were eligible for inclusion if they had unilateral secondary lymphoedema of the arm, stage one as defined by the International Society of Lymphology [<xref ref-type="bibr" rid="CR18">18</xref>], confirmed by a professional lymphoedema therapist, had completed treatment for breast cancer (surgery, radiotherapy and chemotherapy) at least six months previously, were over 18 years and had sufficient English language comprehension to provide informed consent and understand yoga instruction. Women were advised that no new exercise should be commenced during the trial. Women were excluded if they had recurrent cancer, an infection or were having Complex Lymphoedema Therapy, if they were pregnant, wore a pacemaker, which would affect bioimpedance (BIS) readings, had severe psychological illness or were currently doing yoga. Women’s safety being paramount, it was thought that including only stage one BCRL may reduce the chance of a flare-up of lymphoedema occurring. The trial was advertised on local radio and in local newspapers, with lymphoedema therapists and breast care nurses throughout Tasmania and on community and health related noticeboards.</p><p>A manual containing information on best current care for BCRL was given to all participants at the commencement of the trial on the instructions of the overseeing ethics committee. Recommended current care included information on wearing of professionally fitted compression sleeve and when to wear it, continuing recommended skin care and avoiding cuts to the skin and extreme temperatures, wearing non-restrictive clothing, maintaining a healthy weight, and using the affected arm without undue strain such as repeating the same movement or holding the arm in one position for a long period of time. Women were advised to continue any current exercise, but not to commence any new activity during the trial period, and to seek immediate medical help in the event of an exacerbation of lymphoedema during the trial. Compliance to this request was measured using the International Physical Activity Questionnaire (IPAQ), a reliable measure of activity in this population [<xref ref-type="bibr" rid="CR19">19</xref>] in the week prior to each measurement period. Daily physical activity was measured using a VAS scale as previously described [<xref ref-type="bibr" rid="CR16">16</xref>].</p></sec><sec id="Sec6"><title>Control group</title><p>As lymphoedema is a medical condition that will worsen without treatment, participants randomised to the control group were requested to maintain their usual self-care throughout the trial period and were offered the same 8-week teacher led yoga with home-practice DVD as the intervention group at the completion of the final measurement.</p></sec><sec id="Sec7"><title>Yoga intervention group</title><p>The intervention consisted of a weekly 90-min teacher-led yoga class and a daily 45-min home-practice yoga session provided by DVD in addition to their usual self-care. Participants recorded their daily practice along with any relevant comments in a personal logbook. Women had the choice of wearing their compression sleeve during each session, as long as the compression sleeve was worn immediately on completion of each yoga session [<xref ref-type="bibr" rid="CR20">20</xref>].</p><p>The Satyananda Yoga® style [<xref ref-type="bibr" rid="CR21">21</xref>] was chosen as its systematised and progressive practices are based on an integrated system consisting of pranayama, asana, meditation and relaxation with options for modifications. The practices were chosen following the principles of manual lymphatic drainage [<xref ref-type="bibr" rid="CR22">22</xref>], with gentle ROM actions of the shoulder and spine focussing on posture and kinematic movement patterns while engaging core and shoulder-stabilising muscles, and stress reduction. Safety precautions and exercise guidelines for women with BCRL were adhered to [<xref ref-type="bibr" rid="CR23">23</xref>]. A full rationale [<xref ref-type="bibr" rid="CR24">24</xref>] and basic outline of the yoga program [<xref ref-type="bibr" rid="CR17">17</xref>] for the yoga group has been described previously.</p></sec><sec id="Sec8"><title>Outcome measurements</title><p>Anthropometric measurements were conducted and followed by shoulder ROM and strength tests with the same trained assessor at each time-point. A sub-group of women (<italic>n</italic> = 15), who volunteered for spinal ROM were tested on the day following other measurements. Participants were asked to volunteer separately for this assessment due to the need to partially undress for assessment, and were assured of the privacy they would be given.</p></sec><sec id="Sec9"><title>Range of motion of shoulder</title><p>Active shoulder ROM was measured according to an established reliable and validated method [<xref ref-type="bibr" rid="CR25">25</xref>] using a two-armed goniometer [<xref ref-type="bibr" rid="CR26">26</xref>]. Briefly, participants sat in a low-back chair with stable shoulder blades and suitable back support, their knees bent to 90° and their feet at hip width and flat on the floor. Flexion, abduction and extension of the shoulder in the sagittal or coronal planes were measured with the arms in anatomical position. Internal and external rotation of the shoulder were measured from the starting position of the arm abducted to 90°, forearm pronated and parallel to the floor, palm down, with elbow bent to 90°. To prevent fatigue of the affected arm, measuring was conducted in the following order: flexion, internal rotation, extension, abduction, external rotation. The endpoint of measurement was full range, compensatory movements of the shoulder or trunk occurring, or participant experiencing pain or tightness. The final score was recorded in degrees as the best of three attempts [<xref ref-type="bibr" rid="CR25">25</xref>].</p></sec><sec id="Sec10"><title>Strength of shoulder and pectoralis major, pectoralis minor and serratus anterior</title><p>Muscle strength was measured according to an established protocol [<xref ref-type="bibr" rid="CR27">27</xref>] using a reliable and valid handheld dynamometer (Commander Powertrack II Muscle Tester; JTechMedical, Salt Lake City, Utah, USA) [<xref ref-type="bibr" rid="CR28">28</xref>]. The participant sat in a stable position and the non-affected, then the affected, arm was measured in turn, three times for each action. The arm was raised to 90° for the strength measurements of flexion, horizontal adduction and abduction. To measure the strength in extension, the participant’s arm was by her side. The arm was positioned slightly across the body for the strength measurement of the pectoralis major and the arm elevated to 120° for the serratus anterior. The strength of pectoralis minor was measured with the participant in supine position. This was also the order of measuring used to prevent fatigue.</p><p>The strength of the shoulder/separate muscles (pectoralis major, pectoralis minor, serratus anterior) was measured from the force applied against the resisted hand-held dynamometer, held by the assessor, for a count of three seconds. Measurement ceased when full strength was applied, compensatory movements of the shoulder or trunk occurred or pain was experienced. The best of three attempts was recorded in Newtons (N).</p></sec><sec id="Sec11"><title>Grip strength</title><p>Hand grip strength was assessed using a hand-held grip dynamometer (Smedleys, TTM, <ext-link ext-link-type="uri" xlink:href="http://www.stoeltingco.com/">www.stoeltingco.com</ext-link>), validated for use in a clinical setting [<xref ref-type="bibr" rid="CR29">29</xref>], as previously described [<xref ref-type="bibr" rid="CR16">16</xref>].</p></sec><sec id="Sec12"><title>Spinal mobility</title><p>Spinal mobility was measured dynamically using video analysis in order to quantify the functional mobility of the spine during lateral flexion and flexion/extension from a stable standing position and thoracic spinal rotation in a stable sitting position according to established protocols [<xref ref-type="bibr" rid="CR30">30</xref>]. Each movement was performed three times in a slow controlled fashion with no break between repetitions.</p><p>Movements were recorded by a video camera with backlighting, utilising reflective surface markers placed on participants’ skin at the following locations: left and right posterior superior iliac spines (LPSI, RPSI), spinal processes (S1, L3, L1, T6, T1) and left and right acromion (LACR, RACR). Reflective markers were also placed on the wall and floor for calibration. At the initial measurements, the distance between markers applied to the participant’s skin was recorded to ensure consistency.</p><p>Video data was analysed using Quintic™ Sports Biomechanics Video Analysis Software (9.03 version 14; Quintic Consultancy Limited; <ext-link ext-link-type="uri" xlink:href="http://www.quintic.com/">www.quintic.com</ext-link>). Measurements were made of the position of each marker in the reference plane from resting position to range in each direction. This allowed calculation of the angles in degrees defined in Table <xref rid="Tab1" ref-type="table">1</xref>, following methods described elsewhere [<xref ref-type="bibr" rid="CR30">30</xref>]. The range of excursion of each angle was recorded, except for pelvic obliquity and angle of kyphosis at rest which were static angles.<table-wrap id="Tab1"><label>Table 1</label><caption><p>Relationship between markers and angles for spinal mobility</p></caption><table frame="hsides" rules="groups"><thead><tr><th>Abbreviation</th><th>Action</th><th>Definition</th></tr></thead><tbody><tr><td colspan="3">Lateral Flexion</td></tr><tr><td> β1</td><td>Pelvic obliquity at rest</td><td>Angle at rest between the pelvic axis (the vector LPSI-RPSI) and the horizontal plane.</td></tr><tr><td> β2</td><td>Lumbar lateral flexion range</td><td>Angle between S1-L1 vector and the vertical pelvic axis through full range of lateral flexion.</td></tr><tr><td> β3</td><td>Thoracic lateral flexion range</td><td>Angle between the T1-L1 vector and S1-L1 vector through full range of lateral flexion.</td></tr><tr><td> β4</td><td>Shoulder range</td><td>Angle between the vector connecting both shoulders with the horizontal plane through full range of lateral flexion.</td></tr><tr><td> βdc</td><td>Thoracic distal curvature range</td><td>Angle between vectors S1-L3 and L3-T6 through full range of lateral flexion.</td></tr><tr><td> βpc</td><td>Thoracic proximal curvature range</td><td>Angle between vectors L3-T6 and T6-T1 through full range of lateral flexion.</td></tr><tr><td> βlti</td><td>Full lateral trunk inclination range</td><td>Angle between the S1-T1 vector and the vertical axis through full range of lateral flexion.</td></tr><tr><td colspan="3">Flexion-Extension/Rotation</td></tr><tr><td> αkrest</td><td>Angle of thoracic kyphosis at rest</td><td>Angle at rest between the vectors L3 –T6 and T6-T1.</td></tr><tr><td> α3</td><td>Thoracic range</td><td>Angle between the vector T1-L1 and the vector S1-L1 through the full range of flexion/extension.</td></tr><tr><td> αfti</td><td>Full trunk flexion/extension range</td><td>Angle between the S1-T1 vector and the vertical axis in flexion/extension.</td></tr><tr><td> Tr</td><td>Thoracic spinal rotation range</td><td>Angle between the vector from the line of the shoulders (LACR – RACR) and the vector defined by the line of the hips (LPSI - RPSI) throughout the full range of thoracic spinal rotation.</td></tr></tbody></table></table-wrap></p></sec><sec id="Sec13"><title>Data analysis</title><p>Baseline information for demographic and medical characteristics between treatment groups were compared by independent two-tailed t-tests for continuous variables and by Yates corrected chi-square tests for categorical variables (SPSS version 19; IBM, Armonk, New York, USA). Statistical analyses of outcome measures at baseline and changes between groups at weeks 8 and 12 were performed using STATA statistical software (version 12; STATA Corporation, College Station, Texas, USA). Parametric longitudinal data were analysed via mixed methods linear regression (ANOVA). Where assumptions of linear regression were violated, data were analysed using non-parametric analysis via ordinal logistic regression. Post-hoc testing was performed on all data using the Holms test to locate the means that were significantly different. Statistical significance was set at <italic>p</italic> < 0.05. Due to the low sample size neither multivariate nor covariate analyses were performed. Data is presented as Mean (M) and Standard Deviation (SD) unless otherwise indicated.</p></sec></sec><sec id="Sec14"><title>Results</title><p>Participant flow through the trial is presented in Fig. <xref rid="Fig1" ref-type="fig">1</xref>. From 59 potential participants who expressed an interest in the study, 28 consented and underwent baseline testing with 15 randomised to the yoga intervention and 13 to the usual care control.<fig id="Fig1"><label>Fig. 1</label><caption><p>Flow of the trial</p></caption><graphic xlink:href="12906_2016_1330_Fig1_HTML" id="MO1"></graphic></fig></p><sec id="Sec15"><title>Compliance with the intervention</title><p>Two participants withdrew after being diagnosed with recurrent cancer during the trial while seven others experienced adverse events requiring their withdrawal from the study that were unrelated to either their condition or the treatment. Briefly, five participants withdrew due to adverse events unrelated to the yoga intervention during the eight-week intervention period while another four withdrew between the end of the intervention and the follow up measurement (Fig. <xref rid="Fig1" ref-type="fig">1</xref>).</p><p>Due to these events, fewer participants returned for the week-12 follow-up than completed the week 8 measurements. Consequently, the results from baseline to end of the 8 week intervention (b-8) and end of the week 8 intervention to week 12 follow-up (8b-12) were analysed separately.</p><p>Apart from that prescribed for the intervention group, during the trial, no women in either group were doing yoga, nor had they done it since developing BCRL. Attendance at the yoga sessions was high (97 %), as was self-reported compliance with the home-practice DVD (86 %). There were no statistically significant changes in physical activity by either group across all time points as measured by either the IPAQ questionnaire or VAS scale.</p></sec><sec id="Sec16"><title>Characteristics of the group</title><p>There were no demographic or medical differences from diagnosis and treatment for breast cancer and lymphoedema in the groups at baseline (Table <xref rid="Tab2" ref-type="table">2</xref>). Twenty-three participants, with a mean age of 57.6 ± 10.5 years (range 34–80) and a mean BMI of 27.2 ± 4.9 kg/m<sup>2</sup> (range 20.4–37.3), completed the eight week intervention and 19 women returned for the week 12 follow-up measurement.<table-wrap id="Tab2"><label>Table 2</label><caption><p>Participants baseline and medical characteristics of the groups</p></caption><table frame="hsides" rules="groups"><thead><tr><th>Characteristic</th><th>Intervention (<italic>n</italic> = 12)</th><th>Control (<italic>n</italic> = 11)</th><th><italic>P</italic> value<sup>a</sup></th></tr></thead><tbody><tr><td>Age (years; Mean ± SD)</td><td>55.1 ± 2.5</td><td>60.5 ± 3.6</td><td>0.230</td></tr><tr><td>Range</td><td>36–65</td><td>34–80</td><td></td></tr><tr><td>Number nodes removed (Mean ± SD)</td><td>14.3 ± 2.6</td><td>11.2 ± 2.7</td><td>0.429</td></tr><tr><td>Range</td><td>5–30</td><td>2–25</td><td></td></tr><tr><td>How long lymphoedema (years; Mean ± SD)</td><td>4.9 ± 1.6</td><td>5.5 ± 1.9</td><td>0.900</td></tr><tr><td>Range</td><td>6 months–20 years</td><td>1 month–23 years</td><td></td></tr><tr><td>How long post-surgery (years; Mean ± SD)</td><td>1.2 ± 0.4</td><td>1.9 ± 0.7</td><td>0.822</td></tr><tr><td>Range</td><td>1 month–5 years</td><td>1 month–8 years</td><td></td></tr><tr><td></td><td>n %</td><td>n %</td><td><italic>P</italic> value<sup>b</sup></td></tr><tr><td colspan="4">Occupation</td></tr><tr><td> Home, retired</td><td>5 (42)</td><td>8 (73)</td><td>0.280</td></tr><tr><td> Employed</td><td>7 (58)</td><td>3 (27)</td><td></td></tr><tr><td colspan="4">Fitness (self-scored)</td></tr><tr><td> Low</td><td>2 (17)</td><td>1 (9)</td><td></td></tr><tr><td> Medium</td><td>8 (67)</td><td>8 (73)</td><td>0.913</td></tr><tr><td> High</td><td>2 (17)</td><td>2 (18)</td><td></td></tr><tr><td colspan="4">Most significant exercise</td></tr><tr><td> Walking</td><td>8 (67)</td><td>8 (73)</td><td>0.890</td></tr><tr><td> Gardening</td><td>7 (58)</td><td>7 (64)</td><td>0.867</td></tr><tr><td> Gym - organised exercise</td><td>1 (8)</td><td>8 (73)</td><td>0.006</td></tr><tr><td colspan="4">Type of surgery</td></tr><tr><td> Lumpectomy</td><td>5 (42)</td><td>3 (27)</td><td></td></tr><tr><td> Mastectomy</td><td>7 (58)</td><td>8 (73)</td><td>0.882</td></tr><tr><td colspan="4">Type of lymph dissection</td></tr><tr><td> Sentinel node</td><td>0</td><td>1 (9)</td><td></td></tr><tr><td> Axillary clearance</td><td>12 (75)</td><td>10 (73)</td><td>0.980</td></tr><tr><td colspan="4">Stage of breast cancer</td></tr><tr><td> Ductal Carcinoma In Situ (DCIS)</td><td>0</td><td>1 (9)</td><td></td></tr><tr><td> 1</td><td>3 (25)</td><td>4 (36)</td><td></td></tr><tr><td> 2</td><td>6 (50)</td><td>5 (45)</td><td>0.976</td></tr><tr><td> 3</td><td>3 (25)</td><td>1 (9)</td><td></td></tr><tr><td colspan="4">Treatment</td></tr><tr><td> Chemotherapy</td><td>8 (66)</td><td>6 (54)</td><td>0.867</td></tr><tr><td> Radiotherapy</td><td>9 (75)</td><td>7 (64)</td><td>0.890</td></tr><tr><td colspan="4">Most common area of radiotherapy</td></tr><tr><td> Chest</td><td>7 (58)</td><td>7 (64)</td><td></td></tr><tr><td> Axilla</td><td>2 (17)</td><td>2 (18)</td><td>0.909</td></tr><tr><td> Axilla and chest</td><td>3 (25)</td><td>2 (18)</td><td></td></tr><tr><td colspan="4">Lymphoedema dominant/non-dominant</td></tr><tr><td> Dominant</td><td>7 (58)</td><td>7 (64)</td><td>0.867</td></tr><tr><td> Non-dominant</td><td>5 (42)</td><td>4 (36)</td><td></td></tr></tbody></table><table-wrap-foot><p>*<italic>P</italic> < 0.05</p><p><sup>a</sup><italic>P</italic> values obtained using two-tailed independent samples <italic>t</italic>-test</p><p><sup>b</sup><italic>P</italic> values obtained using chi-square test with Yates correction</p></table-wrap-foot></table-wrap></p></sec><sec id="Sec17"><title>Outcomes</title><sec id="Sec18"><title>BMI</title><p>At baseline, the intervention group had a higher BMI (Mean Difference (MD) 4.03 kg; 95 % Confidence Intervals (CI): 0.24 to 7.81; <italic>p</italic> = 0.023) than the control group. However, at week 8 (MD −0.6 kg; 95 % CI: −1.98 to −0.01; <italic>p</italic> = 0.147) and at week 12 (MD −0.41 kg; 95 % CI: −1 to 0.187; <italic>p</italic> = 0.378) this difference was not significant. Due to the low numbers in the trial no correlation analysis was carried out for the BMI baseline measurement.</p></sec><sec id="Sec19"><title>Shoulder ROM</title><p>At baseline there was an inhibited ROM in all shoulder ROM measures across both groups with the affected arm exhibiting non-significant reduced ROM compared to the affected arm. There were no statistically significant differences in shoulder ROM between groups at baseline. From b-8, there was a difference in the change between groups in abduction (MD −14.70°; 95 % CI: −29.30 to −0.10; <italic>p</italic> = 0.049) and flexion (MD −19.00°; 95 % CI: −33.65 to −4.36; <italic>p</italic> = 0.011) of the non-affected arm due to the increase in abduction (MD 10.7°; 95 % CI:-0.08 to 21.48; <italic>p</italic> = 0.052) and flexion (MD 20.5°; 95 % CI: 9.68 to 31.32; <italic>p</italic> = 0.001) in the control group and little change in the intervention group (Table <xref rid="Tab3" ref-type="table">3</xref>). Each group had significant changes for other actions (Table <xref rid="Tab3" ref-type="table">3</xref>).<table-wrap id="Tab3"><label>Table 3</label><caption><p>Results shoulder ROM b-8 and 8b-12</p></caption><table frame="hsides" rules="groups"><thead><tr><th colspan="4">Within group changes b-8</th><th colspan="3">Between group changes b-8</th><th colspan="3">Within group changes 8b-12</th><th colspan="2">Between group changes 8b-12</th></tr><tr><th>VariableGp (n)</th><th>Week 0<break></break>m ± SD</th><th>Week 8<break></break>m ± SD</th><th>P (0–8)</th><th>∆int-∆con 0–8<break></break>Md; (95 % CI)</th><th>P (0–8)</th><th>VariableGp (n)</th><th>Week 8b<break></break>m ± SD</th><th>Week 12<break></break>m ± SD</th><th>P (8b)</th><th>∆int-∆con 8b-12<break></break>Md; (95 % CI)</th><th>P (8b-12)</th></tr></thead><tbody><tr><td colspan="12">Abduction affected</td></tr><tr><td> Con(11)</td><td>91.82 ± 19.46</td><td>105.00 ± 14.01</td><td>0.008</td><td rowspan="2">−5.43;(−18.95 to 8.08)</td><td rowspan="2">0.431</td><td>Con(10)</td><td>104.40 ± 14.62</td><td>108.30 ± 16.49</td><td>0.344</td><td rowspan="2">−4.90; (−16.64 to 6.84)</td><td rowspan="2">0.413</td></tr><tr><td> Int(12)</td><td>88.17 ± 16.45</td><td>95.92 ± 15.70</td><td>0.104</td><td>Int(9)</td><td>92.56 ± 16.48</td><td>91.56 ± 10.25</td><td>0.818</td></tr><tr><td colspan="12">Abduction non-affected</td></tr><tr><td> Con(10)</td><td>100.00 ± 18.45</td><td>110.70 ± 14.36</td><td>0.052</td><td rowspan="2">−14.70;(−29.30 to −0.10)</td><td rowspan="2">0.049</td><td>Con(9)</td><td>109.44 ± 14.64</td><td>114.22 ± 12.37</td><td>0.305</td><td rowspan="2">−3.00; (−15.92 to 9.92)</td><td rowspan="2">0.649</td></tr><tr><td> Int(12)</td><td>101.58 ± 17.75</td><td>97.58 ± 16.19</td><td>0.426</td><td>Int(9)</td><td>93.00 ± 16.17</td><td>94.78 ± 8.03</td><td>0.703</td></tr><tr><td colspan="7">Flexion affected</td><td colspan="5"></td></tr><tr><td> Con(11)</td><td>101.82 ± 17.31</td><td>121.18 ± 16.89</td><td>0.001</td><td rowspan="2">−7.45;(−19.45 to 4.65)</td><td rowspan="2">0.228</td><td>Con(10)</td><td>119.80 ± 17.14</td><td>122.50 ± 16.96</td><td>0.530</td><td rowspan="2">−1.37; (13.61 to 10.87)</td><td rowspan="2">0.827</td></tr><tr><td> Int(12)</td><td>103.75 ± 12.47</td><td>115.67 ± 12.49</td><td>0.005</td><td>Int(9)</td><td>112.22 ± 12.62</td><td>113.56 ± 13.87</td><td>0.769</td></tr><tr><td colspan="12">Flexion non-affected</td></tr><tr><td> Con(10)</td><td>106.10 ± 13.80</td><td>126.60 ± 13.37</td><td>0.001</td><td rowspan="2">−19.00;(−33.65 to −4.36)</td><td rowspan="2">0.011</td><td>Con(9)</td><td>125.33 ± 13.53</td><td>126.44 ± 16.68</td><td>0.847</td><td rowspan="2">4.89; (−11.12 to 20.89)</td><td rowspan="2">0.549</td></tr><tr><td> Int(12)</td><td>110.08 ± 10.23</td><td>111.58 ± 15.66</td><td>0.766</td><td>Int(9)</td><td>106.89 ± 15.26</td><td>112.89 ± 15.50</td><td>0.299</td></tr><tr><td colspan="2">Internal rotation affected</td><td colspan="10"></td></tr><tr><td> Con(11)</td><td>47.18 ± 20.24</td><td>52.82 ± 18.76</td><td>0.526<sup>a</sup></td><td rowspan="2">6.86;(7.20 to 20.92)</td><td rowspan="2">0.448<sup>a</sup></td><td>Con(10)</td><td>52.70 ± 19.77</td><td>57.00 ± 19.43</td><td>0.056</td><td rowspan="2">−10.97;(−17.37 to −4.56)</td><td rowspan="2">0.001</td></tr><tr><td> Int(12)</td><td>45.83 ± 14.53</td><td>58.33 ± 11.51</td><td>0.050<sup>a</sup></td><td>Int(9)</td><td>58.78 ± 11.44</td><td>52.11 ± 13.08</td><td>0.005</td></tr><tr><td colspan="3">Internal rotation non-affected</td><td colspan="9"></td></tr><tr><td> Con(10)</td><td>47.40 ± 10.43</td><td>59.30 ± 13.12</td><td>0.031</td><td rowspan="2">−6.15;(−20.80 to 8.52)</td><td rowspan="2">0.411</td><td>Con(9)</td><td>59.22 ± 13.91</td><td>55.11 ± 15.07</td><td>0.316</td><td rowspan="2">1.67; (−9.71 to 13.04)</td><td rowspan="2">0.774</td></tr><tr><td> Int(12)</td><td>53.00 ± 17.49</td><td>58.75 ± 14.72</td><td>0.255</td><td>Int(9)</td><td>59.00 ± 15.98</td><td>56.56 ± 11.78</td><td>0.551</td></tr><tr><td colspan="12">Extension affected</td></tr><tr><td> Con(11)</td><td>38.36 ± 9.29</td><td>48.27 ± 8.92</td><td>0.030</td><td rowspan="2">−0.41;(−9.41 to 8.59)</td><td rowspan="2">0.929</td><td>Con(10)</td><td>48.20 ± 9.40</td><td>51.60 ± 7.81</td><td>0.147</td><td rowspan="2">−5.96; (−12.64 to 0.73)</td><td rowspan="2">0.081</td></tr><tr><td> Int(12)</td><td>35.42 ± 11.45</td><td>44.92 ± 11.65</td><td>0.003</td><td>Int(9)</td><td>42.33 ± 12.21</td><td>39.78 ± 10.65</td><td>0.302</td></tr><tr><td colspan="12">Extension non-affected</td></tr><tr><td> Con(10)</td><td>39.50 ± 9.25</td><td>48.30 ± 4.45</td><td>0.005<sup>a</sup></td><td rowspan="2">3.03;(−6.12 to 12.18)</td><td rowspan="2">0.768<sup>a</sup></td><td>Con(9)</td><td>47.89 ± 4.51</td><td>51.78 ± 7.26</td><td>0.120</td><td rowspan="2">−6.33; (−13.27 to 0.60)</td><td rowspan="2">0.073</td></tr><tr><td> Int (12)</td><td>37.42 ± 12.10</td><td>49.25 ± 11.69</td><td>0.021<sup>a</sup></td><td>Int(9)</td><td>48.89 ± 13.37</td><td>46.44 ± 11.22</td><td>0.328</td></tr><tr><td colspan="12">External rotation affected</td></tr><tr><td> Con(11)</td><td>65.54 ± 11.89</td><td>71.00 ± 6.29</td><td>0.041<sup>a</sup></td><td rowspan="2">−2.20;(−12.34 to 7.95)</td><td rowspan="2">0.360<sup>a</sup></td><td>Con(10)</td><td>70.30 ± 6.17</td><td>72.50 ± 6.65</td><td>0.282</td><td rowspan="2">−4.20; (−10.02 to 1.62)</td><td rowspan="2">0.157</td></tr><tr><td> Int(12)</td><td>63.33 ± 20.28</td><td>66.50 ± 11.12</td><td>0.945<sup>a</sup></td><td>Int(9)</td><td>64.56 ± 12.20</td><td>62.56 ± 9.83</td><td>0.353</td></tr><tr><td colspan="12">External rotation non-affected</td></tr><tr><td> Con(10)</td><td>70.50 ± 14.30</td><td>71.60 ± 14.20</td><td>0.702</td><td rowspan="2">−2.35;(−9.98 to 5.28)</td><td rowspan="2">0.546</td><td>Con(9)</td><td>70.89 ± 14.87</td><td>72.44 ± 13.69</td><td>0.353</td><td rowspan="2">0.89; (−3.76 to 5.53)</td><td rowspan="2">0.708</td></tr><tr><td> Int(12)</td><td>69.08 ± 12.32</td><td>67.83 ± 12.10</td><td>0.634</td><td>Int(9)</td><td>63.67 ± 10.28</td><td>66.11 ± 11.25</td><td>0.145</td></tr></tbody></table><table-wrap-foot><p>∆ = change, <italic>Gp</italic> Group, <italic>M ± SD</italic> Mean ± Standard Deviation, <italic>MD</italic> Mean Difference, <italic>CI</italic> Confidence Interval, <italic>n</italic> number, <italic>Con</italic> control group, <italic>Int</italic> intervention group</p><p><sup>a</sup> non-parametric analysis</p></table-wrap-foot></table-wrap></p><p>From 8b-12, the intervention group demonstrated decreased internal rotation of the affected arm compared to the control group (MD −10.97°; 95 % CI: −17.37 to −4.56; <italic>p</italic> = 0.001) due to the decrease in the intervention group (MD −6.67°; 95 % CI: −11.31 to −2.02; <italic>p</italic> = 0.005) and the increase in the control group (MD 4.3°; 95 % CI: −0.11 to 8.78; <italic>p</italic> = 0.056). Results for shoulder ROM are presented in Table <xref rid="Tab3" ref-type="table">3</xref>.</p></sec><sec id="Sec20"><title>Shoulder strength</title><p>There were no differences between groups in actions of shoulder strength at baseline. From b-8 and 8b-12, there were no significant changes between groups. However, from b-8, abduction of both the affected (MD 9.5 kg; 95 % CI: 0.34 to 18.66; <italic>p</italic> = 0.042) and the non-affected (MD 11.58 kg; 95 % CI: 0.25 to 22.91; <italic>p</italic> = 0.045) shoulder increased in the intervention group (Table <xref rid="Tab4" ref-type="table">4</xref>).<table-wrap id="Tab4"><label>Table 4</label><caption><p>Results strength b-8 and 8b-12</p></caption><table frame="hsides" rules="groups"><thead><tr><th colspan="2">Within group changes b-8</th><th colspan="5">Between group changes b-8</th><th colspan="3">Within group changes 8b-12</th><th colspan="3">Between group changes 8b-12</th></tr><tr><th>Variable<break></break>Gp (n)</th><th>Week 0<break></break>m ± SD</th><th>Week 8<break></break>m ± SD</th><th>P (0–8)</th><th>P(0)</th><th>∆int-∆con 0–8<break></break>Md; (95 % CI)</th><th>P(0–8)</th><th>Variable<break></break>Gp (n)</th><th>Week 8b<break></break>m ± SD</th><th>Week 12<break></break>m ± SD</th><th>P (8b-12)</th><th>∆int-∆con 8b-12<break></break>Md; (95 % CI)</th><th>P(8b-12)</th></tr></thead><tbody><tr><td colspan="13">SHOULDER STRENGTH</td></tr><tr><td colspan="8"> Abduction affected</td><td colspan="5"></td></tr><tr><td> Con(11)</td><td>66.69 ± 27.75</td><td>71.11 ± 22.16</td><td>0.365</td><td rowspan="2">0.327</td><td rowspan="2">5.08; (−8.16 to 18.33)</td><td rowspan="2">0.452</td><td>Con(10)</td><td>71.18 ± 23.36</td><td>64.42 ± 21.17</td><td>0.074</td><td rowspan="2">2.89; (−7.88 to 13.67)</td><td rowspan="2">0.599</td></tr><tr><td> Int(12)</td><td>56.83 ± 23.26</td><td>66.33 ± 22.82</td><td>0.042</td><td>Int(9)</td><td>64.49 ± 23.54</td><td>60.62 ± 31.69</td><td>0.332</td></tr><tr><td colspan="13"> Abduction non-affected</td></tr><tr><td> Con(10)</td><td>71.82 ± 28.95</td><td>75.24 ± 21.77</td><td>0.573</td><td rowspan="2">0.246</td><td rowspan="2">8.16; (−8.26 to 24.58)</td><td rowspan="2">0.330</td><td>Con(9)</td><td>75.29 ± 23.09</td><td>70.09 ± 19.62</td><td>0.220</td><td rowspan="2">−1.20; (13.28 to 10.88)</td><td rowspan="2">0.846</td></tr><tr><td> Int(11)</td><td>59.18 ± 23.76</td><td>70.76 ± 26.07</td><td>0.045</td><td>Int(9)</td><td>68.75 ± 26.45</td><td>61.02 ± 22.61</td><td>0.153</td></tr><tr><td colspan="2"> Flexion affected</td><td colspan="11"></td></tr><tr><td> Con(11)</td><td>73.13 ± 24.33</td><td>78.51 ± 29.09</td><td>0.298</td><td rowspan="2">0.777</td><td rowspan="2">−2.83; (−16.86 to 11.20)</td><td rowspan="2">0.692</td><td>Con(10)</td><td>79.10 ± 30.60</td><td>76.04 ± 30.64</td><td>0.506</td><td rowspan="2">−0.56; (−13.67 to 12.54)</td><td rowspan="2">0.933</td></tr><tr><td> Int(12)</td><td>70.17 ± 24.20</td><td>72.72 ± 24.34</td><td>0.606</td><td>Int(9)</td><td>71.53 ± 26.62</td><td>67.91 ± 27.82</td><td>0.455</td></tr><tr><td colspan="3"> Flexion non-affected</td><td colspan="10"></td></tr><tr><td> Con(10)</td><td>69.04 ± 24.44</td><td>79.78 ± 28.66</td><td>0.071</td><td rowspan="2">0.964</td><td rowspan="2">−5.54; (−21.63 to 10.55)</td><td rowspan="2">0.500</td><td>Con(9)</td><td>81.07 ± 30.09</td><td>83.91 ± 30.38</td><td>0.525</td><td rowspan="2">−8.53; (−21.31 to 4.25)</td><td rowspan="2">0.191</td></tr><tr><td> Int(11)</td><td>68.53 ± 30.45</td><td>73.73 ± 25.17</td><td>0.359</td><td>Int(9)</td><td>74.98 ± 26.73</td><td>69.84 ± 31.86</td><td>0.230</td></tr><tr><td colspan="13"> Extension affected</td></tr><tr><td> Con(11)</td><td>93.44 ± 18.33</td><td>82.51 ± 31.07</td><td>0.098</td><td rowspan="2">0.293</td><td rowspan="2">−0.59; (−18.53 to 17.35)</td><td rowspan="2">0.949</td><td>Con(10)</td><td>83.06 ± 32.69</td><td>79.52 ± 26.76</td><td>0.504</td><td rowspan="2">−3.82; (−18.89 to 11.26)</td><td rowspan="2">0.620</td></tr><tr><td> Int(12)</td><td>81.85 ± 30.26</td><td>70.33 ± 29.12</td><td>0.069</td><td>Int(9)</td><td>64.51 ± 27.04</td><td>57.16 ± 25.52</td><td>0.187</td></tr><tr><td colspan="13"> Extension non-affected</td></tr><tr><td> Con (10)</td><td>88.72 ± 20.82</td><td>87.84 ± 29.56</td><td>0.902</td><td rowspan="2">0.329</td><td rowspan="2">−8.94; (−28.25 to 10.37)</td><td rowspan="2">0.364</td><td>Con(9)</td><td>86.60 ± 31.08</td><td>87.64 ± 32.16</td><td>0.833</td><td rowspan="2">−3.90; (−18.03 to 10.23)</td><td rowspan="2">0.588</td></tr><tr><td> Int (11)</td><td>78.58 ± 26.33</td><td>68.76 ± 20.62</td><td>0.149</td><td>Int(9)</td><td>67.33 ± 20.67</td><td>65.69 ± 28.97</td><td>0.585</td></tr><tr><td colspan="13"> Horizontal adduction affected</td></tr><tr><td> Con (11)</td><td>58.00 ± 19.86</td><td>60.80 ± 15.41</td><td>0.485</td><td rowspan="2">0.744</td><td rowspan="2">−1.88; (−12.77 to 9.00)</td><td rowspan="2">0.734</td><td>Con(10)</td><td>60.06 ± 16.04</td><td>58.52 ± 20.06</td><td>0.644</td><td rowspan="2">−4.82; (−14.32 to 4.69)</td><td rowspan="2">0.321</td></tr><tr><td> Int(12)</td><td>55.73 ± 18.56</td><td>56.65 ± 13.60</td><td>0.811</td><td>Int(9)</td><td>54.02 ± 13.21</td><td>47.67 ± 8.23</td><td>0.071</td></tr><tr><td colspan="13"> Horizontal adduction non-affected</td></tr><tr><td> Con(10)</td><td>59.60 ± 21.42</td><td>63.80 ± 13.44</td><td>0.356</td><td rowspan="2">0.851</td><td rowspan="2">−7.40; (−19.72 to 4.92)</td><td rowspan="2">0.239</td><td>Con(9)</td><td>63.56 ± 14.23</td><td>66.47 ± 18.32</td><td>0.376</td><td rowspan="2">−8.54; (−17.90 to 0.84)</td><td rowspan="2">0.074</td></tr><tr><td> Int(11)</td><td>58.20 ± 19.24</td><td>55.00 ± 14.82</td><td>0.461</td><td>Int(9)</td><td>53.90 ± 13.04</td><td>47.91 ± 9.12</td><td>0.105</td></tr><tr><td colspan="13">SEPARATE MUSCLES</td></tr><tr><td colspan="13"> Pectoralis major affected</td></tr><tr><td> Con(11)</td><td>53.99 ± 18.91</td><td>53.40 ± 14.36</td><td>0.891</td><td rowspan="2">0.918</td><td rowspan="2">−2.16; (−13.82 to 9.50)</td><td rowspan="2">0.717</td><td>Con(10)</td><td>52.80 ± 14.99</td><td>50.38 ± 11.52</td><td>0.327</td><td rowspan="2">−0.02; (−7.05 to 7.00)</td><td rowspan="2">0.995</td></tr><tr><td> Int(12)</td><td>54.82 ± 21.97</td><td>52.07 ± 17.05</td><td>0.504</td><td>Int(9)</td><td>50.60 ± 16.24</td><td>48.16 ± 13.85</td><td>0.347</td></tr><tr><td colspan="13"> Pectoralis major non-affected</td></tr><tr><td> Con(10)</td><td>55.00 ± 18.26</td><td>57.20 ± 14.67</td><td>0.549</td><td rowspan="2">0.679</td><td rowspan="2">−4.60; (−14.52 to 5.33)</td><td rowspan="2">0.364</td><td>Con(9)</td><td>54.76 ± 13.22</td><td>58.67 ± 15.12</td><td>0.133</td><td rowspan="2">−11.80; (−19.21 to −4.38)</td><td rowspan="2">0.002</td></tr><tr><td> Int(11)</td><td>58.40 ± 21.63</td><td>56.00 ± 19.04</td><td>0.493</td><td>Int(9)</td><td>54.45 ± 18.70</td><td>47.18 ± 15.01</td><td>0.004</td></tr><tr><td colspan="13"> Pectoralis minor affected</td></tr><tr><td> Con(11)</td><td>25.80 ± 6.89</td><td>28.80 ± 4.77</td><td>0.101</td><td rowspan="2">0.611</td><td rowspan="2">−0.98; (−5.95 to 3.98)</td><td rowspan="2">0.698</td><td>Con(10)</td><td>29.48 ± 4.42</td><td>22.44 ± 2.27</td><td>0.001</td><td rowspan="2">0.44; (−2.73 to 3.61)</td><td rowspan="2">0.786</td></tr><tr><td> Int(12)</td><td>26.95 ± 5.79</td><td>28.97 ± 4.48</td><td>0.250</td><td>Int(9)</td><td>29.33 ± 3.97</td><td>22.73 ± 4.92</td><td>0.001</td></tr><tr><td colspan="13"> Pectoralis minor non-affected</td></tr><tr><td> Con(11)</td><td>27.40 ± 8.93</td><td>29.20 ± 6.82</td><td>0.495</td><td rowspan="2">0.898</td><td rowspan="2">−0.80; (−8.11 to 6.51)</td><td rowspan="2">0.830</td><td>Con(10)</td><td>29.26 ± 7.19</td><td>22.22 ± 5.33</td><td>0.002</td><td rowspan="2">1.46; (−5.11 to 8.03)</td><td rowspan="2">0.663</td></tr><tr><td> Int(11)</td><td>27.00 ± 8.81</td><td>28.00 ± 7.24</td><td>0.705</td><td>Int(9)</td><td>28.60 ± 7.98</td><td>22.98 ± 4.68</td><td>0.024</td></tr><tr><td colspan="13"> Serratus Anterior affected</td></tr><tr><td> Con(11)</td><td>37.77 ± 7.02</td><td>46.00 ± 15.16</td><td>0.059</td><td rowspan="2">0.657</td><td rowspan="2">1.09; (−9.93 to 12.10)</td><td rowspan="2">0.847</td><td>Con(10)</td><td>45.32 ± 15.80</td><td>46.20 ± 16.17</td><td>0.168<sup>a</sup></td><td rowspan="2">−3.32; (−13.91 to 7.26)</td><td rowspan="2">0.264<sup>a</sup></td></tr><tr><td> Int(12)</td><td>35.86 ± 13.88</td><td>44.18 ± 12.18</td><td>0.008</td><td>Int(9)</td><td>47.44 ± 10.58</td><td>44.00 ± 10.08</td><td>0.593<sup>a</sup></td></tr><tr><td colspan="13"> Serratus Anterior non-affected</td></tr><tr><td> Con(10)</td><td>33.00 ± 7.89</td><td>49.94 ± 13.24</td><td>0.001</td><td rowspan="2">0.981</td><td rowspan="2">−4.28; (−11.46 to 2.90)</td><td rowspan="2">0.243</td><td>Con(9)</td><td>50.36 ± 13.98</td><td>45.78 ± 15.59</td><td>0.190</td><td rowspan="2">1.35; (−8.58 to 11.29)</td><td rowspan="2">0.789</td></tr><tr><td> Int(11)</td><td>37.18 ± 12.29</td><td>45.80 ± 10.68</td><td>0.001</td><td>Int(9)</td><td>45.93 ± 9.14</td><td>43.27 ± 7.04</td><td>0.379</td></tr><tr><td colspan="13"> Handgrip affected</td></tr><tr><td> Con(11)</td><td>24.6 ± 5.9</td><td>25.5 ± 3.9</td><td>0.439</td><td rowspan="2">0.866</td><td rowspan="2">−0.905 (−3.935 to 2.125)</td><td rowspan="2">0.558</td><td>Con(10)</td><td>24.8 ± 3.47</td><td>21.55 ± 3.72</td><td>0.002</td><td>3.58; (1.50 to 5.67)</td><td rowspan="2">0.01<sup>a</sup></td></tr><tr><td> Int (12)</td><td>25.1 ± 8.9</td><td>25.0 ± 7.4</td><td>0.969</td><td>Int(9)</td><td>24.39 ± 7.70</td><td>24.72 ± 8.72</td><td colspan="2">0.525<sup>a</sup></td></tr><tr><td colspan="13"> Handgrip non affected</td></tr><tr><td> Con (11)</td><td>25.5 ± 3.5</td><td>25.3 ± 3.9</td><td>0.768</td><td rowspan="2">0.481</td><td rowspan="2">1.583 (−0.666 to 3.833)</td><td rowspan="2">0.168</td><td>Con(9)</td><td>24.39 ± 2.95</td><td>24.06 ± 2.18</td><td>0.672</td><td rowspan="2">0.83; (−1.35 to 3.02)</td><td rowspan="2">0.455</td></tr><tr><td> Int (12)</td><td>23.8 ± 7.1</td><td>25.1 ± 6.9</td><td>0.085</td><td>Int(9)</td><td>23.22 ± 6.36</td><td>23.72 ± 7.04</td><td>0.526</td></tr></tbody></table><table-wrap-foot><p>Baseline (b) = 0</p><p>∆ = change, <italic>Gp</italic> Group, <italic>M</italic> ± <italic>SD</italic> Mean ± Standard Deviation, <italic>MD</italic> Mean Difference, <italic>CI</italic> Confidence Interval, <italic>n</italic> number, <italic>Con</italic> control group, <italic>Int</italic> intervention group</p><p><sup>a</sup> non-parametric analysis</p></table-wrap-foot></table-wrap></p></sec><sec id="Sec21"><title>Strength of pectoralis major, pectoralis minor and serratus anterior</title><p>There were no differences between groups in strength actions for these muscles at baseline. From b-8, there were no changes between groups. From 8b-12, there was a decrease in the strength of the non-affected pectoralis major in the intervention compared to the control group (MD −11.80 N; 95 % CI: −19.21 to −4.38; <italic>p</italic> = 0.002) due to the decrease in the intervention group (MD −7.88 N; 95%CI −13.27 to −2.50; <italic>p</italic> = 0.004). Both groups had significant increases for serratus anterior at week 8 and significant decreases for pectoralis minor at week 12 (Table <xref rid="Tab4" ref-type="table">4</xref>).</p></sec><sec id="Sec22"><title>Grip strength</title><p>There were no differences between groups in grip strength at baseline or from b-8. From 8b-12 there was a decrease in grip strength of the affected arm (MD 3.58 kg; 95 % CI:1.50 to 5.67; <italic>p</italic> = 0.01) due to the decrease in the control group (MD −3.25 kg; 95 % CI −4.69 to −1.82; <italic>p</italic> = 0.002) (Table <xref rid="Tab4" ref-type="table">4</xref>).</p></sec><sec id="Sec23"><title>Spinal mobility</title><p>At baseline, the intervention group had a higher (worse) angle of pelvic obliquity compared to the control group (MD +9.97°; 95 % CI: 2.76 to 17.17; <italic>p</italic> = 0.007). From b-8, the angle of pelvic obliquity was lower (improved) in the intervention group compared to the control group (MD −8.39°; 95 % CI: −15.64 to −1.13; <italic>p</italic> = 0.023) due to the reduction in pelvic obliquity in the intervention group (MD −9.96°; CI: −14.54 to −5.37; <italic>p</italic> = 0.001).</p><p>At baseline, the angle of thoracic kyphosis at rest was higher (worse) in the intervention group (MD 8.13°; 95 % CI: −0.10 to 16.37; <italic>p</italic> = 0.053). From b-8, there was a tendency towards reduction (improvement) for the angle of kyphosis in the intervention group compared to the control group (MD −3.88°; 95 % CI −8.08 to 0.32; <italic>p</italic> = 0.070).</p><p>No between-group changes from b-8 or 8b-12 were observed for any other measure of spinal mobility (Table <xref rid="Tab5" ref-type="table">5</xref>).<table-wrap id="Tab5"><label>Table 5</label><caption><p>Results spinal mobility b-8 and 8b-12</p></caption><table frame="hsides" rules="groups"><thead><tr><th colspan="4">Within group changes b-8</th><th colspan="3">Between group changes b-8</th><th colspan="3">Within group changes 8b-12</th><th colspan="3">Between group changes 8b-12</th></tr><tr><th>VariableGp (n)</th><th>Week 0<break></break>m ± SD</th><th>Week 8<break></break>m ± SD</th><th>P (0–8)</th><th>P (0)</th><th>∆int-∆con 0–8<break></break>Md; (95 % CI)</th><th>P (0–8)</th><th>Variable<break></break>Gp (n)</th><th>Week 8b<break></break>m ± SD</th><th>Week 12<break></break>m ± SD</th><th>P (8b-12)</th><th>∆int-∆con 8b-12<break></break>Md; (95 % CI)</th><th>P (8b-12)</th></tr></thead><tbody><tr><td colspan="13">LATERAL FLEXION</td></tr><tr><td colspan="13"> Pelvic Obliquity β1</td></tr><tr><td> Con(6)</td><td>15.40 ± 6.23</td><td>13.83 ± 6.09</td><td>0.585</td><td rowspan="2">0.007</td><td rowspan="2">−8.39; (−15.64 to −1.13)</td><td rowspan="2">0.023</td><td>Con(6)</td><td>13.83 ± 6.09</td><td>13.72 ± 8.79</td><td>0.972</td><td rowspan="2">0.52; (−8.29 to 9.33)</td><td rowspan="2">0.908</td></tr><tr><td> Int(9)</td><td>25.37 ± 6.90</td><td>15.41 ± 7.94</td><td>0.001</td><td>Int(7)</td><td>13.44 ± 5.58</td><td>13.84 ± 7.22</td><td>0.896</td></tr><tr><td colspan="13"> Lumbar range β2</td></tr><tr><td> Con(6)</td><td>24.82 ± 15.37</td><td>17.27 ± 9.12</td><td>0.016</td><td rowspan="2">0.521</td><td rowspan="2">6.48; (−1.43 to 14.40)</td><td rowspan="2">0.109</td><td>Con(6)</td><td>17.27 ± 9.12</td><td>19.33 ± 6.11</td><td>0.512</td><td rowspan="2">−5.54; (−13.96 to 2.88)</td><td rowspan="2">0.197</td></tr><tr><td> Int(9)</td><td>21.18 ± 10.35</td><td>20.11 ± 8.34</td><td>0.676</td><td>Int(7)</td><td>20.56 ± 9.12</td><td>17.09 ± 4.53</td><td>0.234</td></tr><tr><td colspan="8"> Thoracic range β3</td><td colspan="5"></td></tr><tr><td> Con(6)</td><td>48.80 ± 11.71</td><td>51.90 ± 3.14</td><td>0.286</td><td rowspan="2">0.543</td><td rowspan="2">0.72; (−6.63 to 8.08)</td><td rowspan="2">0.847</td><td>Con(6)</td><td>51.90 ± 3.14</td><td>55.63 ± 6.16</td><td>0.103</td><td rowspan="2">−2.91; (−9.02 to 3.21)</td><td rowspan="2">0.352</td></tr><tr><td> Int(9)</td><td>45.18 ± 14.55</td><td>49.00 ± 10.52</td><td>0.107</td><td>Int(7)</td><td>48.86 ± 9.31</td><td>49.69 ± 13.22</td><td>0.696</td></tr><tr><td colspan="13"> Shoulder range β4</td></tr><tr><td> Con(6)</td><td>92.08 ± 17.91</td><td>86.55 ± 11.96</td><td>0.151</td><td rowspan="2">0.962</td><td rowspan="2">3.21; (−6.55 to 12.97)</td><td rowspan="2">0.519</td><td>Con(6)</td><td>86.55 ± 11.96</td><td>87.77 ± 13.56</td><td>0.730</td><td rowspan="2">−2.06; (−11.47 to 7.35)</td><td rowspan="2">0.668</td></tr><tr><td> Int(9)</td><td>92.64 ± 25.78</td><td>90.32 ± 26.22</td><td>0.461</td><td>Int(7)</td><td>86.24 ± 26.01</td><td>85.40 ± 23.43</td><td>0.796</td></tr><tr><td colspan="13"> Thoracic distal curvature range βdc</td></tr><tr><td> Con(6)</td><td>47.83 ± 12.60</td><td>48.40 ± 6.16</td><td>0.920</td><td rowspan="2">0.518</td><td rowspan="2">6.50; (−7.70 to 20.70)</td><td rowspan="2">0.370</td><td>Con(6)</td><td>48.40 ± 6.16</td><td>43.42 ± 8.16</td><td>0.102</td><td rowspan="2">4.44; (−3.70 to 12.58)</td><td rowspan="2">0.285</td></tr><tr><td> Int(9)</td><td>43.72 ± 11.78</td><td>50.79 ± 14.59</td><td>0.123</td><td>Int(7)</td><td>50.99 ± 16.75</td><td>50.44 ± 17.53</td><td>0.847</td></tr><tr><td colspan="13"> Thoracic proximal curvature range βpc</td></tr><tr><td> Con(6)</td><td>29.62 ± 14.55</td><td>31.65 ± 9.83</td><td>0.663</td><td rowspan="2">0.898</td><td rowspan="2">−5.52; (−17.34 to 6.30)</td><td rowspan="2">0.360</td><td>Con(6)</td><td>31.65 ± 9.83</td><td>34.35 ± 13.48</td><td>0.408</td><td rowspan="2">−0.54; (−9.26 to 8.18)</td><td rowspan="2">0.903</td></tr><tr><td> Int(9)</td><td>30.66 ± 20.07</td><td>27.17 ± 13.23</td><td>0.360</td><td>Int(7)</td><td>26.20 ± 11.47</td><td>28.36 ± 10.77</td><td>0.475</td></tr><tr><td colspan="13"> Full lateral trunk inclination range βlti</td></tr><tr><td> Con(6)</td><td>60.12 ± 13.61</td><td>52.70 ± 7.60</td><td>0.024</td><td rowspan="2">0.505</td><td rowspan="2">−0.87; (−9.19 to 7.45)</td><td rowspan="2">0.837</td><td>Con(6)</td><td>52.70 ± 7.60</td><td>55.22 ± 10.16</td><td>0.406</td><td rowspan="2">−2.87; (−10.97 to 5.22)</td><td rowspan="2">0.486</td></tr><tr><td> Int(9)</td><td>65.07 ± 16.45</td><td>56.78 ± 14.88</td><td>0.002</td><td>Int(7)</td><td>55.47 ± 15.58</td><td>55.11 ± 12.13</td><td>0.899</td></tr><tr><td colspan="13">FLEXION EXTENSION/ROTATION</td></tr><tr><td colspan="13"> Angle of thoracic kyphosis at rest αkrest</td></tr><tr><td> Con (6)</td><td>23.47 ± 8.68</td><td>25.80 ± 5.72</td><td>0.160</td><td rowspan="2">0.053</td><td rowspan="2">−3.88; (−8.08 to 0.32)</td><td rowspan="2">0.070</td><td>Con(6)</td><td>25.80 ± 5.72</td><td>21.57 ± 9.18</td><td>0.039</td><td rowspan="2">2.48; (−3.01 to 7.96)</td><td rowspan="2">0.376</td></tr><tr><td> Int (9)</td><td>31.60 ± 10.45</td><td>30.06 ± 7.86</td><td>0.254</td><td>Int(7)</td><td>30.69 ± 8.68</td><td>28.93 ± 10.85</td><td>0.355</td></tr><tr><td colspan="13"> Thoracic range α3</td></tr><tr><td> Con (6)</td><td>58.58 ± 10.03</td><td>58.63 ± 10.06</td><td>0.995</td><td rowspan="2">0.053</td><td rowspan="2">5.34; (−15.22 to 25.90)</td><td rowspan="2">0.611</td><td>Con(6)</td><td>58.63 ± 10.06</td><td>57.52 ± 14.28</td><td>0.873</td><td rowspan="2">3.95; (−14.73 to 22.62)</td><td rowspan="2">0.679</td></tr><tr><td> Int(9)</td><td>43.40 ± 16.90</td><td>48.79 ± 17.12</td><td>0.417</td><td>Int(7)</td><td>54.57 ± 14.38</td><td>57.40 ± 13.00</td><td>0.662</td></tr><tr><td colspan="12"> Full trunk flexion/extension range αfti</td><td></td></tr><tr><td> Con(6)</td><td>163.78 ± 20.43</td><td>175.02 ± 1.88</td><td>0.016<sup>a</sup></td><td rowspan="2">.098<sup>a</sup></td><td rowspan="2">7.48; (−31.00 to 45.95)</td><td rowspan="2">0.684<sup>a</sup></td><td>Con(6)</td><td>175.02 ± 1.88</td><td>166.88 ± 19.33</td><td>0.168</td><td rowspan="2">7.08; (−8.66 to 22.82)</td><td rowspan="2">0.378</td></tr><tr><td> Int(9)</td><td>135.93 ± 38.86</td><td>154.64 ± 30.64</td><td>0.125<sup>a</sup></td><td>Int(7)</td><td>151.56 ± 34.21</td><td>150.50 ± 39.95</td><td>0.846</td></tr><tr><td colspan="13"> Thoracic spinal rotation range Tr</td></tr><tr><td> Con(6)</td><td>84.23 ± 28.98</td><td>87.00 ± 20.01</td><td>0.764</td><td rowspan="2">0.171</td><td rowspan="2">8.28; (−15.05 to 31.60)</td><td rowspan="2">0.487</td><td>Con(6)</td><td>87.00 ± 20.01</td><td>93.62 ± 22.60</td><td>0.141</td><td rowspan="2">−7.79; (−19.79 to 4.21)</td><td rowspan="2">0.203</td></tr><tr><td> Int(9)</td><td>66.22 ± 28.33</td><td>77.27 ± 21.07</td><td>0.142</td><td>Int(7)</td><td>77.06 ± 13.80</td><td>75.88 ± 16.14</td><td>0.778</td></tr></tbody></table><table-wrap-foot><p>Baseline(b) = 0</p><p>∆ = change, <italic>Gp</italic> Group, <italic>M</italic> ± <italic>SD</italic> Mean ± Standard Deviation, <italic>MD</italic> Mean Difference, <italic>CI</italic> Confidence Interval, <italic>n</italic> number, <italic>Con</italic> control group, <italic>Int</italic> intervention group</p><p><sup>a</sup> non-parametric analysis</p></table-wrap-foot></table-wrap></p></sec></sec></sec><sec id="Sec24"><title>Discussion</title><p>To the best of our knowledge this was the first study to examine the effects of a yoga intervention on shoulder and spinal ROM and shoulder strength in women with BCRL. The major finding was that pelvic obliquity was reduced following the eight week yoga intervention. A secondary finding was that strength was increased following the yoga intervention for shoulder abduction in both the affected and non-affected arm.</p><p>There was noticeable lateral tilt of the pelvis (as measured by pelvic obliquity) for both the control and intervention group at baseline indicating variation from ideal posture. Changes in posture may be affected by a number of factors for this cohort including complications associated with BCRL. The one study on body posture of those with BCRL [<xref ref-type="bibr" rid="CR5">5</xref>] reported that participants displayed mediolateral pelvic movement and dropped shoulder to the affected side when walking. In addition faulty body posture has been reported after breast cancer treatment of mastectomy [<xref ref-type="bibr" rid="CR31">31</xref>] a high risk factor for BCRL, indicating a forward leaning of the trunk and lack of symmetry in the trunk and shoulders. These changes may be a result of the swelling, the different weight distribution of the lymphoedematous limb and changed biomechanics of the trunk and shoulder girdle from breast cancer treatment, similar to what has been reported for those with lower limb lymphoedema [<xref ref-type="bibr" rid="CR32">32</xref>]. Nevertheless it must be acknowledged that it is not uncommon for women in this age group (median age 58) to have pelvic obliquity from various age and life related stresses on the lower body and pelvis including the effects of childbirth [<xref ref-type="bibr" rid="CR33">33</xref>] affecting postural alignment, pelvic stability, and walking gait and hence the observed pelvic obliquity may not be solely associated with BCRL.</p><p>The yoga intervention resulted in an improvement (reduction) in a static postural measure, the angle of pelvic obliquity, between the groups (<italic>p</italic> = 0.023) due to an improvement in the yoga intervention group (<italic>p</italic> = 0.001). In addition thoracic kyphosis, demonstrated a non-significant improvement for the yoga group compared to the control group (<italic>p</italic> = 0.07). While the intervention group was outside the normative values for this measure at baseline [<xref ref-type="bibr" rid="CR30">30</xref>], there were no significant changes in either group. While the differences between the groups at baseline limit the ability to form conclusions about the changes observed for this measure, changes in the angle of kyphosis may need a longer intervention than the current trial with reductions in kyphosis in one yoga trial reported following three one hour yoga sessions per week for 24 weeks [<xref ref-type="bibr" rid="CR34">34</xref>]. Yoga focusses on teaching postural alignment from the feet through to the pelvis, shoulders, neck and head before commencing any of the physical, breathing or meditative practices. There is also a strong focus on body awareness (<italic>kaya sthairyam</italic>). In the current trial postural alignment and awareness were taught before, during and after each practice in order to create a stable foundation. Core stabilisation is also a key feature of yoga and is achieved by engaging the muscles of the transversus abdominis and pelvic floor (<italic>moolabhanda</italic>) before engaging other muscles in many yoga postures or as part of breathing practices. While core strength was not measured in the current trial, the improvement in pelvic obliquity indicated at least an awareness of maintaining pelvic stability [<xref ref-type="bibr" rid="CR15">15</xref>]. Pelvic stability while standing was improved following core stability exercises [<xref ref-type="bibr" rid="CR35">35</xref>] and in a Pilates intervention [<xref ref-type="bibr" rid="CR36">36</xref>]. Although there were improvements in pelvic stability in the intervention group it must be acknowledged that differences existing at baseline meant that the potential for improvement was high.</p><p>Strength in shoulder abduction improved in both arms following the yoga intervention. However, these were not significantly different to changes observed following the control period, possibly due to the small sample size in this pilot study. Nevertheless these results support previous uncontrolled studies showing improvements in handgrip strength following a yoga intervention [<xref ref-type="bibr" rid="CR37">37</xref>] although this was not supported by any improvements in hand grip strength in the current study. The yoga intervention had no weight-bearing on the arms; however, the focus on stabilisation of the scapula/shoulder complex (<italic>amsa bandha</italic>,) occurred for every action. Correct scapula/shoulder stabilisation is dependent on space in the sub-acromial area and scapulohumeral rhythm relies on the correct firing of key stabilising muscles such as the upper and lower trapezius, serratus anterior, pectoral muscles and the rhomboids [<xref ref-type="bibr" rid="CR38">38</xref>], which can be adversely affected by breast cancer treatment [<xref ref-type="bibr" rid="CR39">39</xref>]. Shoulder abduction requires contraction of the supraspinatus and deltoid muscles, which occurs in a fluid action when this sub-acromial space exists. In the current trial, the focus on shoulder stability may have led to improved scapulohumeral rhythm facilitating abduction strength. Another trial based on gentle exercises, similar to the yoga intervention, to achieve scapulohumeral control in a group of participants with scapular dyskinesis (<italic>n</italic> = 18) showed that specific gentle shoulder movements activated the upper and lower trapezius and serratus anterior in both groups [<xref ref-type="bibr" rid="CR40">40</xref>]. We have previously reported reduced symptoms and tissue density in the upper arm and reduction in fluid of the affected arm for the intervention group [<xref ref-type="bibr" rid="CR17">17</xref>]. It is likely that these improvements made the action of abduction easier in the same way reduction of fluid and improved postural alignment and stability improved walking gait of those with lower limb lymhoedema [<xref ref-type="bibr" rid="CR32">32</xref>].</p><p>The intervention was not associated with increases in ROM across any shoulder movement. The focus on creating stability of the glenohumeral complex may explain the lack of increase in ROM. Similar studies involving shoulder stability [<xref ref-type="bibr" rid="CR41">41</xref>] or Pilates [<xref ref-type="bibr" rid="CR36">36</xref>] also found no changes in shoulder ROM. Interestingly, the Pilates intervention reported improved biomechanical control of the scapula and trunk in lateral flexion [<xref ref-type="bibr" rid="CR36">36</xref>], perhaps indicating that stability is achieved prior to changes in ROM. It is possible that the ROM results are due to a learning effect from baseline to week eight as there was a mean increase in 18 of the 20 measures of shoulder ROM in both the intervention and control group over this timeframe. The fact that this pattern did not continue from week 8 to 12 gives weight to this hypothesis. While further study is required to determine the true effects of a yoga intervention on ROM in this population the results highlight the potential importance of inclusion of a familiarity phase prior to data collection in any future study.</p><p>There were no significant between group changes in spinal ROM. In comparison to norms for spinal mobility [<xref ref-type="bibr" rid="CR30">30</xref>], group mean baseline measurements revealed participants in the current trial recorded lower flexion/extension and lateral flexion although they were within the normal range for rotation. However, there was no change in spinal mobility as a result of the yoga intervention. Similar findings were observed following 12 weeks of Pilates [<xref ref-type="bibr" rid="CR36">36</xref>] where it was suggested that participants reduced compensatory movements of the spine by focussing on segmental motion, postural alignment and stability rather than on increasing their range. The results of the current trial support this hypothesis.</p><p>As already acknowledged there are several limitations in this study. These include the lack of familiarity testing prior to data collection, the differences between the groups in certain variables at baseline, as well as the small sample size. Due to a lack of prior data to use to calculate sample size, the a priori sample size calculation performed for this study was based on clinically significant changes in the major outcome variables with an assumed level of variability [<xref ref-type="bibr" rid="CR16">16</xref>]. This indicated that between 13–19 participants would be required per group and we proposed that 20 participants per group would be recruited. Unfortunately we did not achieve the proposed sample size and there was greater variability in the results than anticipated resulting in wider confidence intervals than expected. These factors impacted on the statistical significance of results including potentially the differences between the groups at baseline. Nevertheless the pilot study results obtained provide important initial data which will inform sample size calculations for any future studies.</p></sec><sec id="Sec25"><title>Conclusions</title><p>This pilot study highlights possible improvements in posture evident in the reduction in the angle of pelvic obliquity and trend to a reduced angle of kyphosis as a result of the yoga intervention. Further, the intervention group increased shoulder strength for both arms in the action of abduction, an indicator that improved shoulder stability may have occurred. The improvements observed in this study may possibly be attributed to the focus of the yoga intervention on overall placement of body posture and function in each aspect of the yoga during meditation, breathing, relaxation and execution of the physical postures both moving and stationary. Such increased awareness in body placement and method of movement rather than a focus on increasing flexibility of movement may account for the lack of change in shoulder and spinal ROM. As women with BCRL can experience problems with posture and shoulder actions these results possibly indicate that yoga may offer some positive outcomes. While there are several limitations including a small sample size, the data provides sufficient evidence of the potential benefits of yoga to warrant larger controlled trials following the general methodology outlined in this paper.</p></sec></body><back><glossary><title>Abbreviations</title><def-list><def-item><term>BCRL</term><def><p>Breast cancer related lymphoedema</p></def></def-item><def-item><term>ROM</term><def><p>Range of motion</p></def></def-item><def-item><term>QOL</term><def><p>Quality of life</p></def></def-item><def-item><term>RCT</term><def><p>Randomised controlled trial</p></def></def-item><def-item><term>BIS</term><def><p>Bioimpedance spectroscopy</p></def></def-item><def-item><term>LPSI</term><def><p>Left posterior superior iliac spine</p></def></def-item><def-item><term>RPSI</term><def><p>Right posterior superior iliac spine</p></def></def-item><def-item><term>LACR</term><def><p>Left acromion</p></def></def-item><def-item><term>RACR</term><def><p>Right acromion</p></def></def-item></def-list></glossary><ack><title>Acknowledgements</title><p>Equipment was provided by Flinders University and University of Tasmania. The Women’s Health Centre, Hobart and the Launceston Community Health Centre, Kings Meadows provided venue for conducting the yoga intervention and testing. We acknowledge the voluntary provision of professional services in testing by Marlene Kalis, Christine Lambrechts, Michele Smith, Belinda Mann, Kara Spaulding, Lara Matuszek and Megan Reid and the professional assistance of Chris Dale and Professor David McNeil. We are indebted to the women of Tasmania who volunteered for this trial.</p><sec id="FPar1"><title>Funding</title><p>This study was supported by grants from the Swan Research Institute (SRI) and the Faculty of Health Sciences Seed Funding, UTAS. The funders had no role in the design, collection, analysis or interpretation of the data, or in the writing of the manuscript.</p></sec><sec id="FPar2"><title>Availability of data and materials</title><p>The datasets generated and analysed during the current study are available on Research gate (<ext-link ext-link-type="uri" xlink:href="https://www.researchgate.net/publication/297713856_Yoga_and_BCRL_original_results_deidentified?ev=prf_pu">https://www.researchgate.net/publication/297713856_Yoga_and_BCRL_original_results_deidentified?ev=prf_pu</ext-link>) and are also available from the corresponding author on reasonable request.</p></sec><sec id="FPar3"><title>Authors’ contributions</title><p>AL conceived the trial and with TB and ADW were responsible for the design of this trial and the construction of the measurement protocol for shoulder ROM and strength. DV was responsible for the design of the spinal testing measurement protocol and its associated statistical analysis. AL conducted the yoga intervention. MAI assisted in advice for the yoga intervention. AL and ADW conducted the statistical analysis. AL, ADW and DV drafted and TB, NP, MAI helped draft the mansuscript. All authors read and approved the final manuscript.</p></sec><sec id="FPar4"><title>Authors’ information</title><p>AL is a yoga researcher and trains yoga teachers in yoga therapy.</p><p>TB is Director of Rural Health, University of Tasmania.</p><p>ADW is a senior lecturer in Clinical Exercise Science, University of Tasmania.</p><p>DV is a physicist and lecturer in Clinical Exercise Science, University of Tasmania.</p><p>NP is Director of the lymphoedema clinic at Flinders University.</p><p>MAI is Director of physical movement and yoga researcher at University of South Australia.</p></sec><sec id="FPar5"><title>Competing interests</title><p>The authors declare that they have no competing interests.</p></sec><sec id="FPar6"><title>Consent for publication</title><p>Not Applicable.</p></sec><sec id="FPar7"><title>Ethics approval and consent to participate</title><p>Ethics approval was sought and granted by University of Tasmania Social Science Human Research Ethics Committee on 5th December, 2010, project number H0011534. 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