Effect of a 10-week yoga programme on the quality of life of women after breast cancer surgery
Identifieur interne : 004590 ( Pmc/Corpus ); précédent : 004589; suivant : 004591Effect of a 10-week yoga programme on the quality of life of women after breast cancer surgery
Auteurs : Aleksandra Andysz ; Dorota Merecz ; Aleksandra W Jcik ; Beata Wi Tkowska ; Kamilla Sierocka ; Anna NajderSource :
- Przegla̜d Menopauzalny = Menopause Review [ 1643-8876 ] ; 2014.
Abstract
The following research is aimed at determining the effect of yoga on the quality of life of women after breast cancer surgery.
A 10-week yoga programme included 90-minute yoga lessons once a week. To estimate the quality of life, questionnaires developed by the European Organisation for Research and Treatment of Cancer (QLQ-C30 and QLQ-BR23) were used. An experimental group consisted of 12 women who practised yoga, a control group – of 16 women who did not. Between groups there were no differences in age, time from operation and characteristics associated with disease, treatment and participation in rehabilitation.
Our results revealed an improvement of general health and quality of life, physical and social functioning as well as a reduction of difficulties in daily activities among exercising women. Also their future prospects enhanced – they worried less about their health than they used to before participating in the programme. As compared to baseline, among exercising women, fatigue, dyspnoea and discomfort (pain, swelling, sensitivity) in the arm and breast on the operated side decreased.
Participation in the exercising programme resulted in an improvement of physical functioning, reduction of fatigue, dyspnoea, and discomfort in the area of the breast and arm on the operated side. Based on our results and those obtained in foreign studies, we conclude that rehabilitation with the use of yoga practice improves the quality of life of the patients after breast cancer surgery. However, we recommend further research on this issue in Poland.
Url:
DOI: 10.5114/pm.2014.43823
PubMed: 26327853
PubMed Central: 4520362
Links to Exploration step
PMC:4520362Le document en format XML
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<author><name sortKey="Andysz, Aleksandra" sort="Andysz, Aleksandra" uniqKey="Andysz A" first="Aleksandra" last="Andysz">Aleksandra Andysz</name>
<affiliation><nlm:aff id="AF0001">Department of Occupational Psychology, Nofer Institute of Occupational Medicine, Lodz, Poland</nlm:aff>
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<author><name sortKey="Merecz, Dorota" sort="Merecz, Dorota" uniqKey="Merecz D" first="Dorota" last="Merecz">Dorota Merecz</name>
<affiliation><nlm:aff id="AF0001">Department of Occupational Psychology, Nofer Institute of Occupational Medicine, Lodz, Poland</nlm:aff>
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<author><name sortKey="W Jcik, Aleksandra" sort="W Jcik, Aleksandra" uniqKey="W Jcik A" first="Aleksandra" last="W Jcik">Aleksandra W Jcik</name>
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<author><name sortKey=" Wi Tkowska, Beata" sort=" Wi Tkowska, Beata" uniqKey=" Wi Tkowska B" first="Beata" last=" Wi Tkowska">Beata Wi Tkowska</name>
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<author><name sortKey="Sierocka, Kamilla" sort="Sierocka, Kamilla" uniqKey="Sierocka K" first="Kamilla" last="Sierocka">Kamilla Sierocka</name>
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<author><name sortKey="Najder, Anna" sort="Najder, Anna" uniqKey="Najder A" first="Anna" last="Najder">Anna Najder</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Effect of a 10-week yoga programme on the quality of life of women after breast cancer surgery</title>
<author><name sortKey="Andysz, Aleksandra" sort="Andysz, Aleksandra" uniqKey="Andysz A" first="Aleksandra" last="Andysz">Aleksandra Andysz</name>
<affiliation><nlm:aff id="AF0001">Department of Occupational Psychology, Nofer Institute of Occupational Medicine, Lodz, Poland</nlm:aff>
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<author><name sortKey="Merecz, Dorota" sort="Merecz, Dorota" uniqKey="Merecz D" first="Dorota" last="Merecz">Dorota Merecz</name>
<affiliation><nlm:aff id="AF0001">Department of Occupational Psychology, Nofer Institute of Occupational Medicine, Lodz, Poland</nlm:aff>
</affiliation>
</author>
<author><name sortKey="W Jcik, Aleksandra" sort="W Jcik, Aleksandra" uniqKey="W Jcik A" first="Aleksandra" last="W Jcik">Aleksandra W Jcik</name>
<affiliation><nlm:aff id="AF0001">Department of Occupational Psychology, Nofer Institute of Occupational Medicine, Lodz, Poland</nlm:aff>
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<author><name sortKey=" Wi Tkowska, Beata" sort=" Wi Tkowska, Beata" uniqKey=" Wi Tkowska B" first="Beata" last=" Wi Tkowska">Beata Wi Tkowska</name>
<affiliation><nlm:aff id="AF0002">Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, Poland</nlm:aff>
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<author><name sortKey="Sierocka, Kamilla" sort="Sierocka, Kamilla" uniqKey="Sierocka K" first="Kamilla" last="Sierocka">Kamilla Sierocka</name>
<affiliation><nlm:aff id="AF0003">Certified Iyengar Yoga teacher, Introductory I</nlm:aff>
</affiliation>
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<author><name sortKey="Najder, Anna" sort="Najder, Anna" uniqKey="Najder A" first="Anna" last="Najder">Anna Najder</name>
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<front><div type="abstract" xml:lang="en"><sec id="st1"><title>Aim of the study</title>
<p>The following research is aimed at determining the effect of yoga on the quality of life of women after breast cancer surgery.</p>
</sec>
<sec id="st2"><title>Material and methods</title>
<p>A 10-week yoga programme included 90-minute yoga lessons once a week. To estimate the quality of life, questionnaires developed by the European Organisation for Research and Treatment of Cancer (QLQ-C30 and QLQ-BR23) were used. An experimental group consisted of 12 women who practised yoga, a control group – of 16 women who did not. Between groups there were no differences in age, time from operation and characteristics associated with disease, treatment and participation in rehabilitation.</p>
</sec>
<sec id="st3"><title>Results</title>
<p>Our results revealed an improvement of general health and quality of life, physical and social functioning as well as a reduction of difficulties in daily activities among exercising women. Also their future prospects enhanced – they worried less about their health than they used to before participating in the programme. As compared to baseline, among exercising women, fatigue, dyspnoea and discomfort (pain, swelling, sensitivity) in the arm and breast on the operated side decreased.</p>
</sec>
<sec id="st4"><title>Conclusions</title>
<p>Participation in the exercising programme resulted in an improvement of physical functioning, reduction of fatigue, dyspnoea, and discomfort in the area of the breast and arm on the operated side. Based on our results and those obtained in foreign studies, we conclude that rehabilitation with the use of yoga practice improves the quality of life of the patients after breast cancer surgery. However, we recommend further research on this issue in Poland.</p>
</sec>
</div>
</front>
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<pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Prz Menopauzalny</journal-id>
<journal-id journal-id-type="iso-abbrev">Prz Menopauzalny</journal-id>
<journal-id journal-id-type="publisher-id">MR</journal-id>
<journal-title-group><journal-title>Przegla̜d Menopauzalny = Menopause Review</journal-title>
</journal-title-group>
<issn pub-type="ppub">1643-8876</issn>
<issn pub-type="epub">2299-0038</issn>
<publisher><publisher-name>Termedia Publishing House</publisher-name>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">26327853</article-id>
<article-id pub-id-type="pmc">4520362</article-id>
<article-id pub-id-type="publisher-id">23062</article-id>
<article-id pub-id-type="doi">10.5114/pm.2014.43823</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Original Paper</subject>
</subj-group>
</article-categories>
<title-group><article-title>Effect of a 10-week yoga programme on the quality of life of women after breast cancer surgery</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" corresp="yes"><name><surname>Andysz</surname>
<given-names>Aleksandra</given-names>
</name>
<xref ref-type="aff" rid="AF0001">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Merecz</surname>
<given-names>Dorota</given-names>
</name>
<xref ref-type="aff" rid="AF0001">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Wójcik</surname>
<given-names>Aleksandra</given-names>
</name>
<xref ref-type="aff" rid="AF0001">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Świątkowska</surname>
<given-names>Beata</given-names>
</name>
<xref ref-type="aff" rid="AF0002">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Sierocka</surname>
<given-names>Kamilla</given-names>
</name>
<xref ref-type="aff" rid="AF0003">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Najder</surname>
<given-names>Anna</given-names>
</name>
<xref ref-type="aff" rid="AF0001">1</xref>
</contrib>
</contrib-group>
<aff id="AF0001"><label>1</label>
Department of Occupational Psychology, Nofer Institute of Occupational Medicine, Lodz, Poland</aff>
<aff id="AF0002"><label>2</label>
Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, Poland</aff>
<aff id="AF0003"><label>3</label>
Certified Iyengar Yoga teacher, Introductory I</aff>
<author-notes><corresp id="cor1">Corresponding author: <bold>Aleksandra Andysz</bold>
, Department of Occupational Psychology, Nofer Institute of Occupational Medicine, św. Teresy 8, 91-348 Lodz, Poland. e-mail: <email xlink:href="andysz@imp.lodz.pl">andysz@imp.lodz.pl</email>
</corresp>
</author-notes>
<pub-date pub-type="epub"><day>30</day>
<month>6</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="ppub"><month>6</month>
<year>2014</year>
</pub-date>
<volume>13</volume>
<issue>3</issue>
<fpage>186</fpage>
<lpage>193</lpage>
<history><date date-type="received"><day>13</day>
<month>3</month>
<year>2014</year>
</date>
<date date-type="rev-recd"><day>30</day>
<month>4</month>
<year>2014</year>
</date>
<date date-type="accepted"><day>09</day>
<month>6</month>
<year>2014</year>
</date>
</history>
<permissions><copyright-statement>Copyright © 2014 Termedia</copyright-statement>
<copyright-year>2014</copyright-year>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
</license>
</permissions>
<abstract><sec id="st1"><title>Aim of the study</title>
<p>The following research is aimed at determining the effect of yoga on the quality of life of women after breast cancer surgery.</p>
</sec>
<sec id="st2"><title>Material and methods</title>
<p>A 10-week yoga programme included 90-minute yoga lessons once a week. To estimate the quality of life, questionnaires developed by the European Organisation for Research and Treatment of Cancer (QLQ-C30 and QLQ-BR23) were used. An experimental group consisted of 12 women who practised yoga, a control group – of 16 women who did not. Between groups there were no differences in age, time from operation and characteristics associated with disease, treatment and participation in rehabilitation.</p>
</sec>
<sec id="st3"><title>Results</title>
<p>Our results revealed an improvement of general health and quality of life, physical and social functioning as well as a reduction of difficulties in daily activities among exercising women. Also their future prospects enhanced – they worried less about their health than they used to before participating in the programme. As compared to baseline, among exercising women, fatigue, dyspnoea and discomfort (pain, swelling, sensitivity) in the arm and breast on the operated side decreased.</p>
</sec>
<sec id="st4"><title>Conclusions</title>
<p>Participation in the exercising programme resulted in an improvement of physical functioning, reduction of fatigue, dyspnoea, and discomfort in the area of the breast and arm on the operated side. Based on our results and those obtained in foreign studies, we conclude that rehabilitation with the use of yoga practice improves the quality of life of the patients after breast cancer surgery. However, we recommend further research on this issue in Poland.</p>
</sec>
</abstract>
<kwd-group><kwd>yoga</kwd>
<kwd>rehabilitation</kwd>
<kwd>quality of life</kwd>
<kwd>breast cancer</kwd>
<kwd>mastectomy</kwd>
</kwd-group>
</article-meta>
</front>
<body><sec sec-type="intro" id="S0001"><title>Introduction</title>
<p>The experience of cancer is devastating for many people who suffer from that. Diagnosis, painful treatment, rehabilitation and sense of uncertainty associated with the risk of recurrence significantly influence the quality of life of people suffering from cancer as well as their close friends and relatives. The quality of life of such patients have been widely investigated so far. Extant studies documented how devastating the diagnosis and treatment of cancer could be and how long the sense of loss in various aspects of life can persist [<xref rid="CIT0001" ref-type="bibr">1</xref>
, <xref rid="CIT0002" ref-type="bibr">2</xref>
].</p>
<p>Breast cancer is the most common malignant tumour among women in the world. Over one million new cases are reported every year, what amounts to approximately 22.8% of all registered malignant tumours. Between 1963 and 2011, the number of newly diagnosed breast cancers among Polish women increased six-fold (from 2476 to 16534 cases) [<xref rid="CIT0003" ref-type="bibr">3</xref>
]. The prevalence of breast cancers in 2025 is predicted to be more than 50% higher than in 2006 [<xref rid="CIT0004" ref-type="bibr">4</xref>
].</p>
<p>Unfortunately, although Poland is one of the countries with a moderate level of breast cancer morbidity, we have observed a constantly increasing trend of mortality because of this disease in recent decades. In 2011, five thousand deaths from breast cancer were registered (three times more than in 1963) [<xref rid="CIT0003" ref-type="bibr">3</xref>
]. This results to a great extent from the fact that in Poland breast cancer is usually diagnosed only when it reaches an advanced stage while in Western countries its curability is twice as high as compared to our country – mostly due to broadly defined prevention strategies, including education [<xref rid="CIT0005" ref-type="bibr">5</xref>
].</p>
<p>Currently, we recognize environmental aspects affecting the development of breast cancer (e.g. lifestyle). However, family and genetic risk factors still constitute a significant probability of disease, so it is not always possible to avoid cancer. Therefore, actions aimed at limiting the consequences of this disease and supporting patients’ recovery and return to their normal life activity are of great importance. Psychophysical rehabilitation plays a pivotal role in this process and should make an integral part of breast cancer treatment. Such rehabilitation includes restoring the state of health comparable to the one from the period before the disease as well as satisfactory psychosocial functioning. Having undergone a surgery and left the hospital, patients should continue the rehabilitation with the help of specialists and on their own – following their doctors’ instructions. Unfortunately, still not all Polish breast cancer patients are provided with comprehensive support during the rehabilitation process.</p>
<p>The beginnings of scientific interest in yoga as a rehabilitation method date back to the 1950's as regards Western countries, and to the 1980's as far as Poland is concerned [<xref rid="CIT0006" ref-type="bibr">6</xref>
]. Considered as a system of physical exercises, yoga's advantage is the diversity of its intensity – it can be adjusted to an individual participant's possibilities, regardless of his or her physical condition, diseases or injuries. Yoga's impact on well-being of healthy people as well as those suffering from chronic diseases (including patients with diagnosed breast cancer) has been widely documented [<xref rid="CIT0007" ref-type="bibr">7</xref>
], and the interest in this issue is constantly growing.</p>
<p>Yoga is recommended especially for patients after mastectomy because it offers exercises that make particular parts of the body more flexible but it has also a local effect – such exercises gently stretch the areas of post-surgical adhesions, and make the shoulder girdle and muscles around the armpits stronger and more efficient. Yoga also corrects postural defects. Radical operation such as mastectomy results in unfavourable changes in body posture and trunk static. These changes relate among others to the position of shoulder blades, shoulders, or pelvis, differences in waist triangles width or trunk angle [<xref rid="CIT0008" ref-type="bibr">8</xref>
]. They may result from muscles damage, pain related to post-operative cicatrix or tissue fibrosis caused by radiotherapy [<xref rid="CIT0009" ref-type="bibr">9</xref>
].</p>
<p>Lymphedema of the upper extremities can appear as a complication of surgical treatment of breast cancer and it affects 10-30% of patients [<xref rid="CIT0010" ref-type="bibr">10</xref>
]. Well-chosen exercises make lymph flow more efficiently and thus, they decrease the risk of lymphedema occurrence, or reduce the severity of the existing one [<xref rid="CIT0010" ref-type="bibr">10</xref>
]. Yoga poses (asanas), including trunk twists, massage, purify and regenerate organs of the abdominal cavity. Supported back bends, in turn, open the chest, improve the way heart and lungs work, stimulate the digestive system and increase spine mobility. Yoga practice involves also extended breathing techniques (pranayama) that energize, relax and enhance breathing efficiency.</p>
<p>Yoga programmes described in the extant literature addressed to breast cancer patients were most often based on Hatha Yoga according to B.K.S. Iyengar method. All those programmes involved muscles stretching, breathing exercises and relaxation. The compilation of exercises resulted in a noticeable improvement of musculoskeletal system efficiency, flexibility and strength of muscles, and state of balance. The majority of exercises were performed in supported seated or reclining positions [<xref rid="CIT0011" ref-type="bibr">11</xref>
, <xref rid="CIT0012" ref-type="bibr">12</xref>
]. During such classes, participants made use of props typical for Hatha Yoga according to Iyengar's method – blankets, straps, bolsters or wooden blocks. The abovementioned programmes differed in the length of lessons or the whole series/programmes, which lasted from 6 to 24 weeks [<xref rid="CIT0013" ref-type="bibr">13</xref>
, <xref rid="CIT0014" ref-type="bibr">14</xref>
]. Some of participants practiced yoga 60 minutes a day [<xref rid="CIT0015" ref-type="bibr">15</xref>
] while others exercised for 75 minutes once a week [<xref rid="CIT0016" ref-type="bibr">16</xref>
] or 90 minutes twice a week [<xref rid="CIT0017" ref-type="bibr">17</xref>
].</p>
<p>Most of women who participated in such exercises reported an improvement in their physical, emotional and spiritual functioning. They felt greater peace of mind and hope as well as relief for symptoms associated with treatment. It was also observed that social support from other women suffering from the same disease and having similar experience enhanced the treatment process [<xref rid="CIT0018" ref-type="bibr">18</xref>
]. Performing exercises based on the yoga method reduced also somatic symptoms, namely they decreased the frequency and intensity of nausea and vomiting caused by chemotherapy [<xref rid="CIT0015" ref-type="bibr">15</xref>
]. Extant research documented that day by day women experienced significantly less pain and at the same time, they felt more lively, accepting and relaxed [<xref rid="CIT0019" ref-type="bibr">19</xref>
]. Numerous studies on exercising patients indicated reduction of fatigue caused by the disease and treatment [<xref rid="CIT0019" ref-type="bibr">19</xref>
, <xref rid="CIT0020" ref-type="bibr">20</xref>
]. They also revealed that in comparison with those who did not exercise, women who took physical exercises functioned better socially and emotionally [<xref rid="CIT0021" ref-type="bibr">21</xref>
]. It was also observed that yoga decreased depression, stress or anxiety associated with cancer [<xref rid="CIT0007" ref-type="bibr">7</xref>
, <xref rid="CIT0022" ref-type="bibr">22</xref>
]. Authors of the literature review on yoga classes dedicated to women with breast cancer indicated that such programmes’ impact on the general quality of life can be described as neutral or positive [<xref rid="CIT0023" ref-type="bibr">23</xref>
].</p>
</sec>
<sec id="S0002"><title>Aim of the study</title>
<p>Our rationale to investigate the issue was the need for empirical assessment of the effectiveness of yoga among Polish breast cancer patients. Despite its popularity abroad, the subject of the influence of yoga on functioning of patients after mastectomy and other breast surgeries have not been undertaken in Poland so far. Our research was aimed to fill this gap.</p>
<p>We raised two research questions:<list list-type="order"><list-item><p>Does a programme of rehabilitation classes based on yoga influence the quality of life of women after breast surgery?</p>
</list-item>
<list-item><p>Does the quality of life differ between women after breast surgery who practiced yoga and those who did not?</p>
</list-item>
</list>
</p>
<p>Considering the previous findings, we hypothesized that participating in yoga practice would have a positive impact on the general quality of life as well as emotional and physical functioning of the participants. We also assumed that exercising women would perceive the reduction of fatigue, improvement of body image as well as mobility and strength of the arm on the operated breast side.</p>
</sec>
<sec sec-type="materials|methods" id="S0003"><title>Material and methods</title>
<p>The programme called “Baba Joga kontra rak” (<italic>Baba Joga vs. cancer</italic>
) lasted from April to June 2013. The inspiration for the initiative were yoga classes that have been conducted for 12 years by the Unicorn Cancer Care in Cracow. In order to recruit the participants, a short information campaign about the programme was run by Łódzka Fundacja “Kocham Życie” (NGO foundation from Lodz), in the local supplement to the daily newspaper “Gazeta Wyborcza”, as well as via Facebook. The information about the programme was also spread through the associations gathering Amazons in the Lodz voivodeship. The inclusion criteria included women aged 18-80, with stage I to III of breast cancer who underwent breast surgery. To collect data, we used self-administered questionnaires twice: at the beginning of the project (before the first class) and after 10 weeks of the programme.</p>
<p>The first stage of the study involved 56 women who had come forward in response to the campaign. They were informed about the study aims as well as of anonymity and participation being voluntary. The experimental group consisted of women who participated in the exercising programme. The participants of this group had never practiced yoga before. The control group involved women who were informed about the programme, but decided not to take part in the exercises – they only completed the questionnaires. From the statistical analysis we excluded incomplete questionnaires, those that were filled once only and the data from the participants who attended yoga classes less than four times. Eventually, the experimental group included 12 women and the control group – 16 women.</p>
<p>There were no differences in age, time since the operation, characteristics associated with the disease, its treatment and participation in rehabilitation between women who practised yoga during the programme and those who did not (<xref ref-type="table" rid="T0001">Table I</xref>
). The women in the two groups did not differ as regards their education level, self-assessed level of income or physical activity.
</p>
<table-wrap id="T0001" position="float"><label>Tab. I</label>
<caption><p>Distribution of demographic variables associated with the disease and treatment in both groups and the significance of differences estimated with the use of Mann-Whitney test and Pearson's χ<sup>2</sup>
</p>
</caption>
<table frame="hsides" rules="rows"><thead><tr><th align="left" rowspan="1" colspan="1"></th>
<th align="center" rowspan="1" colspan="1">Exercising</th>
<th align="center" rowspan="1" colspan="1">Non-exercising</th>
<th align="center" rowspan="1" colspan="1">Significance of differences (two-tailed)</th>
</tr>
</thead>
<tbody><tr><td align="left" rowspan="1" colspan="1">Age in years, M ± SD (Min-Max)</td>
<td align="center" rowspan="1" colspan="1">54.8 ± 7.4 (43.2-66.7)</td>
<td align="center" rowspan="1" colspan="1">58.6 ± 10.8 (38.9-76.5)</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Years from operation, M ± SD (Min-Max)</td>
<td align="center" rowspan="1" colspan="1">5.5 ± 4.2 (2.0-15.1)</td>
<td align="center" rowspan="1" colspan="1">7.6 ± 6.4 (0.5-23.7)</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Cancer location, <italic>n</italic>
(%)</td>
<td align="left" rowspan="1" colspan="1"></td>
<td align="left" rowspan="1" colspan="1"></td>
<td align="center" rowspan="4" valign="middle" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Left breast</td>
<td align="center" rowspan="1" colspan="1">5 (42)</td>
<td align="center" rowspan="1" colspan="1">11 (69)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Right breast</td>
<td align="center" rowspan="1" colspan="1">6 (50)</td>
<td align="center" rowspan="1" colspan="1">5 (31)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Both breasts</td>
<td align="center" rowspan="1" colspan="1">1 (8)</td>
<td align="center" rowspan="1" colspan="1">–</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Type of operation, <italic>n</italic>
(%)</td>
<td align="left" rowspan="1" colspan="1"></td>
<td align="left" rowspan="1" colspan="1"></td>
<td align="center" rowspan="4" valign="middle" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Breast conserving surgery</td>
<td align="center" rowspan="1" colspan="1">3 (25)</td>
<td align="center" rowspan="1" colspan="1">3 (19)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Mastectomy</td>
<td align="center" rowspan="1" colspan="1">9 (75)</td>
<td align="center" rowspan="1" colspan="1">13 (81)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Lymph node dissection<xref ref-type="table-fn" rid="TF0001">*</xref>
</td>
<td align="center" rowspan="1" colspan="1">9 (75)</td>
<td align="center" rowspan="1" colspan="1">14 (87)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Type of treatment, <italic>n</italic>
(%)</td>
<td align="left" rowspan="1" colspan="1"></td>
<td align="left" rowspan="1" colspan="1"></td>
<td align="center" rowspan="7" valign="middle" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Chemotherapy</td>
<td align="center" rowspan="1" colspan="1">3 (25)</td>
<td align="center" rowspan="1" colspan="1">5 (31)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Hormone therapy</td>
<td align="center" rowspan="1" colspan="1">–</td>
<td align="center" rowspan="1" colspan="1">2 (13)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Chemotherapy, hormone therapy</td>
<td align="center" rowspan="1" colspan="1">3 (25)</td>
<td align="center" rowspan="1" colspan="1">5 (31)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Radiotherapy, hormone therapy</td>
<td align="center" rowspan="1" colspan="1">2 (17)</td>
<td align="center" rowspan="1" colspan="1">3 (19)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Radiotherapy, chemotherapy, hormone therapy</td>
<td align="center" rowspan="1" colspan="1">2 (17)</td>
<td align="center" rowspan="1" colspan="1">1 (6)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Radiotherapy, chemotherapy, hormone therapy, immunotherapy</td>
<td align="center" rowspan="1" colspan="1">1 (8)</td>
<td align="center" rowspan="1" colspan="1">–</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Participation in rehabilitation, <italic>n</italic>
(%)</td>
<td align="left" rowspan="1" colspan="1"></td>
<td align="left" rowspan="1" colspan="1"></td>
<td align="center" rowspan="3" valign="middle" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> Yes</td>
<td align="center" rowspan="1" colspan="1">9 (75)</td>
<td align="center" rowspan="1" colspan="1">10 (63)</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1"> No</td>
<td align="center" rowspan="1" colspan="1">3 (25)</td>
<td align="center" rowspan="1" colspan="1">6 (37)</td>
</tr>
</tbody>
</table>
<table-wrap-foot><fn id="TF0001"><label>*</label>
<p>Category included both women after breast conserving surgery and after mastectomy</p>
</fn>
</table-wrap-foot>
</table-wrap>
<p>Women, who decided to participate in the programme, paid a fee – the price was low as compared to commercial classes and amounted to approximately 30% of its market value.</p>
<p>Classes took place once a week and lasted 90 minutes and were held in one of the local fitness clubs. Exercises were prepared by a certified and experienced yoga instructor who was the author of the programme. Each class combined poses (asanas), breathing exercises (pranayama), and relaxation. The props typical of Iyengar's Hatha Yoga (bolsters, wooden blocks, straps) were used. All asanas were adjusted to participants’ specific needs considering the fact that women after breast surgery may suffer from pain in the body areas where surgical interventions were applied, their arms’ muscles are weakened and their mobility is decreased.</p>
<p>Exemplary sequence of asanas included: 1) Supta Badha Konasana, 2) Adho Mukha Virasana; standing poses: 3) Tadasana with supported back, 4) Vrksasana, 5) Trikonasana, 6-7) Virabadhrasana I and II; seated poses: 8) Bharadvajasana with a hand supported on the wall or a block, 9) Janu Sirsasana with the use of strap, 10) twist in Upavista Konasana, 11) Upavista Konasana with the use of a strap; lying poses: 12-13) Supta Padangusthasana I and II, 14) Viparita Karani with hips supported on a bolster and legs supported on the wall; relaxation exercises: 15) Pranayama lying or sitting (Ujjayi or Viloma breath), 16) Savasana. To become acquainted with the way the above-mentioned poses look like, please refer to B.K.S. Iyengar's ‘Light on Yoga’.</p>
<p>The quality of life was measured with the use of a questionnaire developed by the European Organisation for Research and Treatment of Cancer (EORTC). It is designed to study oncological patients in different stages of disease and subjected to various forms of therapy [<xref rid="CIT0024" ref-type="bibr">24</xref>
]. It consists of a 30-item basic module (QLQ-C30, version 3.0) addressed to all oncological patients and a supplementary 23-item module for patients with breast cancer (QLQ-BR23). In the following research, we used Polish adaptations of the above questionnaires provided by the EORTC.</p>
<p>The basic module consists of: global health status and quality of life scale, five scales concerning functioning and symptom scales including items relating to occurrence, intensity and upset caused by fatigue, nausea and vomiting, pain, dyspnoea, insomnia, appetite loss, constipation, diarrhoea, and financial difficulties. The module for breast cancer patients includes four scales considering body image, sexual functioning, sexual enjoyment and future perspective and four symptom scales (Systematic therapy side effects, Arm and Breast symptoms and Upset by hair loss).</p>
<p>The participants assessed their functioning and symptoms on a 4-score scale including <italic>not at all</italic>
, <italic>a little</italic>
, <italic>quite a bit</italic>
and <italic>very much</italic>
. The general health state and quality of life were assessed with the use of a 7-score scale from <italic>very poor</italic>
to <italic>excellent</italic>
. To analyse the acquired data, we used standardized results from particular scales [<xref rid="CIT0025" ref-type="bibr">25</xref>
]. Considering the functioning scales and general health status and quality of life, the higher the score, the better functioning or health state/quality of life while in symptoms scales – the higher level of problems.</p>
<sec id="S20004"><title>Statistical analysis</title>
<p>Data were analysed with the use of statistical package SPSS (version 2.1). Since distributions were significantly different from normal, for within- and between-group comparisons non-parametrical tests were used – Mann-Whitney and Wilcoxon, accordingly. χ<sup>2</sup>
contingency index was calculated to estimate the differences in distributions of nominal variables. <italic>P</italic>
values lower than 0.05 indicated statistically significant results.</p>
</sec>
</sec>
<sec sec-type="results" id="S0004"><title>Results</title>
<p><xref ref-type="table" rid="T0002">Table II</xref>
presents means and standard deviations in the questionnaire scales achieved by exercising and non-exercising women, before and after the programme.</p>
<table-wrap id="T0002" position="float"><label>Tab. II</label>
<caption><p>Means, standard deviations and medians of the questionnaire scales in both groups before and after the programme</p>
</caption>
<table frame="hsides" rules="rows"><thead><tr><th align="left" rowspan="3" colspan="1"></th>
<th align="center" colspan="4" rowspan="1">Experimental group</th>
<th align="center" colspan="4" rowspan="1">Control group</th>
</tr>
<tr><th align="center" colspan="2" rowspan="1">First measurement</th>
<th align="center" colspan="2" rowspan="1">Second measurement</th>
<th align="center" colspan="2" rowspan="1">First measurement</th>
<th align="center" colspan="2" rowspan="1">Second measurement</th>
</tr>
<tr><th align="center" rowspan="1" colspan="1">M (SD)</th>
<th align="center" rowspan="1" colspan="1">Me</th>
<th align="center" rowspan="1" colspan="1">M (SD)</th>
<th align="center" rowspan="1" colspan="1">Me</th>
<th align="center" rowspan="1" colspan="1">M (SD)</th>
<th align="center" rowspan="1" colspan="1">Me</th>
<th align="center" rowspan="1" colspan="1">M (SD)</th>
<th align="center" rowspan="1" colspan="1">Me</th>
</tr>
</thead>
<tbody><tr><td colspan="9" align="left" rowspan="1"><bold>Basic module QLQ-C30 – functioning scales</bold>
</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">General health status and quality of life</td>
<td align="center" rowspan="1" colspan="1">61.1 (12.5)</td>
<td align="center" rowspan="1" colspan="1">58.3</td>
<td align="center" rowspan="1" colspan="1">72.2 (14.8)</td>
<td align="center" rowspan="1" colspan="1">75</td>
<td align="center" rowspan="1" colspan="1">56.3 (20.3)</td>
<td align="center" rowspan="1" colspan="1">54.2</td>
<td align="center" rowspan="1" colspan="1">55.6 (23.5)</td>
<td align="center" rowspan="1" colspan="1">50</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Physical functioning</td>
<td align="center" rowspan="1" colspan="1">84.2 (11.8)</td>
<td align="center" rowspan="1" colspan="1">81.7</td>
<td align="center" rowspan="1" colspan="1">85.0 (13.4)</td>
<td align="center" rowspan="1" colspan="1">86.7</td>
<td align="center" rowspan="1" colspan="1">71.1 (17.2)</td>
<td align="center" rowspan="1" colspan="1">73.3</td>
<td align="center" rowspan="1" colspan="1">69.5 (17.1)</td>
<td align="center" rowspan="1" colspan="1">76.7</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Role functioning</td>
<td align="center" rowspan="1" colspan="1">90.3 (13.2)</td>
<td align="center" rowspan="1" colspan="1">100</td>
<td align="center" rowspan="1" colspan="1">86.1 (25.5)</td>
<td align="center" rowspan="1" colspan="1">100</td>
<td align="center" rowspan="1" colspan="1">80.2 (26.7)</td>
<td align="center" rowspan="1" colspan="1">83.3</td>
<td align="center" rowspan="1" colspan="1">68.8 (27.1)</td>
<td align="center" rowspan="1" colspan="1">75</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Emotional functioning</td>
<td align="center" rowspan="1" colspan="1">58.3 (23.8)</td>
<td align="center" rowspan="1" colspan="1">58.3</td>
<td align="center" rowspan="1" colspan="1">64.6 (21.7)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
<td align="center" rowspan="1" colspan="1">51.4 (30.7)</td>
<td align="center" rowspan="1" colspan="1">54.2</td>
<td align="center" rowspan="1" colspan="1">51.7 (29.0)</td>
<td align="center" rowspan="1" colspan="1">50</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Cognitive functioning</td>
<td align="center" rowspan="1" colspan="1">68.1 (28.8)</td>
<td align="center" rowspan="1" colspan="1">75</td>
<td align="center" rowspan="1" colspan="1">75.0 (21.9)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
<td align="center" rowspan="1" colspan="1">56.3 (32.1)</td>
<td align="center" rowspan="1" colspan="1">50</td>
<td align="center" rowspan="1" colspan="1">61.5 (29.0)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Social functioning</td>
<td align="center" rowspan="1" colspan="1">81.9 (20.7)</td>
<td align="center" rowspan="1" colspan="1">83.3</td>
<td align="center" rowspan="1" colspan="1">83.3 (17.4)</td>
<td align="center" rowspan="1" colspan="1">83.3</td>
<td align="center" rowspan="1" colspan="1">70.8 (26.9)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
<td align="center" rowspan="1" colspan="1">63.5 (27.4)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
</tr>
<tr><td colspan="9" align="left" rowspan="1"><bold>Basic module QLQ-C30 – symptoms scales</bold>
</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Fatigue</td>
<td align="center" rowspan="1" colspan="1">32.4 (18.0)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">31.5 (18.2)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">43.8 (20.9)</td>
<td align="center" rowspan="1" colspan="1">38.9</td>
<td align="center" rowspan="1" colspan="1">48.3 (23.4)</td>
<td align="center" rowspan="1" colspan="1">44.4</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Nausea and vomiting</td>
<td align="center" rowspan="1" colspan="1">1.4 (4.8)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">1.4 (4.8)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">30.0 (44.2)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">16.7 (28.5)</td>
<td align="center" rowspan="1" colspan="1">0</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Pain</td>
<td align="center" rowspan="1" colspan="1">13.9 (12.0)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
<td align="center" rowspan="1" colspan="1">25.0 (31.4)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
<td align="center" rowspan="1" colspan="1">41.7 (25.8)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">39.6 (25.7)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Dyspnoea</td>
<td align="center" rowspan="1" colspan="1">19.4 (22.3)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
<td align="center" rowspan="1" colspan="1">5.6 (13.0)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">27.1 (25.0)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">29.2 (31.9)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Insomnia</td>
<td align="center" rowspan="1" colspan="1">44.4 (43.4)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">41.7 (32.2)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">52.1 (40.3)</td>
<td align="center" rowspan="1" colspan="1">50</td>
<td align="center" rowspan="1" colspan="1">52.1 (27.1)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Appetite loss</td>
<td align="center" rowspan="1" colspan="1">5.6 (13.0)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">8.3 (20.7)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">18.8 (34.4)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">18.8 (21.0)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Constipation</td>
<td align="center" rowspan="1" colspan="1">19.4 (30.0)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">16.7 (22.5)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">22.2 (37.1)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">35.4 (39.4)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Diarrhoea</td>
<td align="center" rowspan="1" colspan="1">5.6 (13.0)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">2.8 (9.6)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">8.3 (14.9)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">10.4 (20.1)</td>
<td align="center" rowspan="1" colspan="1">0</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Financial difficulties</td>
<td align="center" rowspan="1" colspan="1">30.6 (38.8)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
<td align="center" rowspan="1" colspan="1">16.7 (22.5)</td>
<td align="center" rowspan="1" colspan="1">0</td>
<td align="center" rowspan="1" colspan="1">47.9 (29.7)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">37.5 (31.9)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
</tr>
<tr><td colspan="9" align="left" rowspan="1"><bold>Breast cancer module QLQ-BR23 – functioning scales</bold>
</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Body image</td>
<td align="center" rowspan="1" colspan="1">69.4 (21.1)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
<td align="center" rowspan="1" colspan="1">76.2 (18.9)</td>
<td align="center" rowspan="1" colspan="1">79.2</td>
<td align="center" rowspan="1" colspan="1">61.5 (31.8)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
<td align="center" rowspan="1" colspan="1">59.9 (35.5)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Sexual functioning<xref ref-type="table-fn" rid="TF0002">*</xref>
</td>
<td align="center" rowspan="1" colspan="1">22.2 (20.5)</td>
<td align="center" rowspan="1" colspan="1">25</td>
<td align="center" rowspan="1" colspan="1">26.4 (20.7)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">24.4 (28.8)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
<td align="center" rowspan="1" colspan="1">20.0 (28.3)</td>
<td align="center" rowspan="1" colspan="1">0</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Sexual enjoyment<xref ref-type="table-fn" rid="TF0002">*</xref>
</td>
<td align="center" rowspan="1" colspan="1">38.1 (23.0)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">57.1 (31.7)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">83.3 (18.3)</td>
<td align="center" rowspan="1" colspan="1">83.3</td>
<td align="center" rowspan="1" colspan="1">75.0 (16.7)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Future prospects</td>
<td align="center" rowspan="1" colspan="1">55.6 (32.8)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
<td align="center" rowspan="1" colspan="1">61.1 (27.8)</td>
<td align="center" rowspan="1" colspan="1">66.7</td>
<td align="center" rowspan="1" colspan="1">39.6 (30.4)</td>
<td align="center" rowspan="1" colspan="1">50</td>
<td align="center" rowspan="1" colspan="1">35.4 (31.0)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
</tr>
<tr><td colspan="9" align="left" rowspan="1"><bold>Breast cancer scales QLQ-BR23 – symptoms scales</bold>
</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Systematic therapy side effects</td>
<td align="center" rowspan="1" colspan="1">18.3 (12.8)</td>
<td align="center" rowspan="1" colspan="1">14.3</td>
<td align="center" rowspan="1" colspan="1">19.4 (14.0)</td>
<td align="center" rowspan="1" colspan="1">19</td>
<td align="center" rowspan="1" colspan="1">27.9 (15.0)</td>
<td align="center" rowspan="1" colspan="1">28.6</td>
<td align="center" rowspan="1" colspan="1">31.3 (16.7)</td>
<td align="center" rowspan="1" colspan="1">31</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Breast symptoms</td>
<td align="center" rowspan="1" colspan="1">7.6 (7.5)</td>
<td align="center" rowspan="1" colspan="1">8.3</td>
<td align="center" rowspan="1" colspan="1">4.9 (5.6)</td>
<td align="center" rowspan="1" colspan="1">4.2</td>
<td align="center" rowspan="1" colspan="1">22.9 (28.9)</td>
<td align="center" rowspan="1" colspan="1">8.3</td>
<td align="center" rowspan="1" colspan="1">31.6 (32.7)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Arm symptoms</td>
<td align="center" rowspan="1" colspan="1">25.9 (17.9)</td>
<td align="center" rowspan="1" colspan="1">27.8</td>
<td align="center" rowspan="1" colspan="1">18.5 (17.3)</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
<td align="center" rowspan="1" colspan="1">42.4 (24.1)</td>
<td align="center" rowspan="1" colspan="1">44.4</td>
<td align="center" rowspan="1" colspan="1">43.8 (26.4)</td>
<td align="center" rowspan="1" colspan="1">44.4</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Upset by hair loss<xref ref-type="table-fn" rid="TF0002">*</xref>
</td>
<td align="center" rowspan="1" colspan="1">100.0 (12.8)</td>
<td align="center" rowspan="1" colspan="1">100</td>
<td align="center" rowspan="1" colspan="1">41.7 (16.7)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">37.5 (27.8)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
<td align="center" rowspan="1" colspan="1">42.9 (31.7)</td>
<td align="center" rowspan="1" colspan="1">33.3</td>
</tr>
</tbody>
</table>
<table-wrap-foot><fn id="TF0002"><label>*</label>
<p>Due to a small number of participants who answered the questions from this scale, the result was not considered in interpretation</p>
</fn>
</table-wrap-foot>
</table-wrap>
<p>To assess yoga's impact on functioning of exercising women, the results from scales differentiating participants in the first stage were not taken into account in further inferring (it referred to Nausea and vomiting and Pain). We analysed the results only from these scales that did not differentiate participants in the first stage but there occurred differences after the programme (<xref ref-type="table" rid="T0003">Table III</xref>
). Therefore, we analysed between-group comparisons of: General health status and quality of life, Physical and Social functioning, Role functioning, Dyspnoea, Future prospects and Arm and Breast symptoms. The differences occurring in the second measurement revealed significantly higher indices of General health status and quality of life, Physical and Social functioning, Role functioning and Future prospects, and significantly lower indices of Dyspnoea, Arm and Breast symptoms and Fatigue (borderline significance <italic>p</italic>
= 0.059) in the experimental group.
</p>
<table-wrap id="T0003" position="float"><label>Tab. III</label>
<caption><p>Mean ranks and results of between-group comparisons of the results from questionnaire scales (Mann-Whitney test)</p>
</caption>
<table frame="hsides" rules="rows"><thead><tr><th align="left" rowspan="1" colspan="1"></th>
<th align="center" colspan="3" rowspan="1">First measurement</th>
<th align="center" colspan="3" rowspan="1">Second measurement</th>
</tr>
<tr><th align="left" rowspan="1" colspan="1"></th>
<th align="center" rowspan="1" colspan="1">Experimental group</th>
<th align="center" rowspan="1" colspan="1">Control group</th>
<th align="center" rowspan="1" colspan="1"><italic>p</italic>
</th>
<th align="center" rowspan="1" colspan="1">Experimental group</th>
<th align="center" rowspan="1" colspan="1">Control group</th>
<th align="center" rowspan="1" colspan="1"><italic>p</italic>
</th>
</tr>
</thead>
<tbody><tr><td colspan="7" align="left" rowspan="1"><bold>Basic module QLQ-C30 – functioning scales</bold>
</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">General health status and quality of life</td>
<td align="center" rowspan="1" colspan="1">15.9</td>
<td align="center" rowspan="1" colspan="1">13.5</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">17.6</td>
<td align="center" rowspan="1" colspan="1">11.1</td>
<td align="center" rowspan="1" colspan="1">0.033</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Physical functioning</td>
<td align="center" rowspan="1" colspan="1">17.6</td>
<td align="center" rowspan="1" colspan="1">12.2</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">19.3</td>
<td align="center" rowspan="1" colspan="1">10.9</td>
<td align="center" rowspan="1" colspan="1">0.007</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Role functioning</td>
<td align="center" rowspan="1" colspan="1">16.1</td>
<td align="center" rowspan="1" colspan="1">13.3</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">18.1</td>
<td align="center" rowspan="1" colspan="1">11.8</td>
<td align="center" rowspan="1" colspan="1">0.035</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Emotional functioning</td>
<td align="center" rowspan="1" colspan="1">15.5</td>
<td align="center" rowspan="1" colspan="1">13.8</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">16.2</td>
<td align="center" rowspan="1" colspan="1">13.2</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Cognitive functioning</td>
<td align="center" rowspan="1" colspan="1">16.4</td>
<td align="center" rowspan="1" colspan="1">13.1</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">16.5</td>
<td align="center" rowspan="1" colspan="1">13.0</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Social functioning</td>
<td align="center" rowspan="1" colspan="1">16.6</td>
<td align="center" rowspan="1" colspan="1">12.9</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">18.0</td>
<td align="center" rowspan="1" colspan="1">11.8</td>
<td align="center" rowspan="1" colspan="1">0.042</td>
</tr>
<tr><td colspan="7" align="left" rowspan="1"><bold>Basic module QLQ-C30 – symptoms scales</bold>
</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Fatigue</td>
<td align="center" rowspan="1" colspan="1">11.8</td>
<td align="center" rowspan="1" colspan="1">16.5</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">11.2</td>
<td align="center" rowspan="1" colspan="1">17.0</td>
<td align="center" rowspan="1" colspan="1">0.059</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Nausea and vomiting</td>
<td align="center" rowspan="1" colspan="1">11.0</td>
<td align="center" rowspan="1" colspan="1">16.4</td>
<td align="center" rowspan="1" colspan="1">0.027</td>
<td align="center" rowspan="1" colspan="1">11.5</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
<td align="center" rowspan="1" colspan="1">0.038</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Pain</td>
<td align="center" rowspan="1" colspan="1">8.9</td>
<td align="center" rowspan="1" colspan="1">18.7</td>
<td align="center" rowspan="1" colspan="1">0.001</td>
<td align="center" rowspan="1" colspan="1">11.4</td>
<td align="center" rowspan="1" colspan="1">16.8</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Dyspnoea</td>
<td align="center" rowspan="1" colspan="1">13.2</td>
<td align="center" rowspan="1" colspan="1">15.5</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">11.0</td>
<td align="center" rowspan="1" colspan="1">17.1</td>
<td align="center" rowspan="1" colspan="1">0.025</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Insomnia</td>
<td align="center" rowspan="1" colspan="1">13.7</td>
<td align="center" rowspan="1" colspan="1">15.1</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">12.9</td>
<td align="center" rowspan="1" colspan="1">15.7</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Appetite loss</td>
<td align="center" rowspan="1" colspan="1">13.2</td>
<td align="center" rowspan="1" colspan="1">15.5</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">12.1</td>
<td align="center" rowspan="1" colspan="1">16.3</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Constipation</td>
<td align="center" rowspan="1" colspan="1">13.9</td>
<td align="center" rowspan="1" colspan="1">14.1</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">12.6</td>
<td align="center" rowspan="1" colspan="1">15.9</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Diarrhoea</td>
<td align="center" rowspan="1" colspan="1">13.8</td>
<td align="center" rowspan="1" colspan="1">15.0</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">13.1</td>
<td align="center" rowspan="1" colspan="1">15.5</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Financial difficulties</td>
<td align="center" rowspan="1" colspan="1">11.8</td>
<td align="center" rowspan="1" colspan="1">16.5</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">11.5</td>
<td align="center" rowspan="1" colspan="1">16.8</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td colspan="7" align="left" rowspan="1"><bold>Breast cancer module QLQ-BR23 – functioning scales</bold>
</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Body image</td>
<td align="center" rowspan="1" colspan="1">15.2</td>
<td align="center" rowspan="1" colspan="1">14.0</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">16.3</td>
<td align="center" rowspan="1" colspan="1">13.2</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Sexual functioning<xref ref-type="table-fn" rid="TF0003">*</xref>
</td>
<td align="center" rowspan="1" colspan="1">14.3</td>
<td align="center" rowspan="1" colspan="1">13.8</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">15.7</td>
<td align="center" rowspan="1" colspan="1">12.7</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Sexual enjoyment<xref ref-type="table-fn" rid="TF0003">*</xref>
</td>
<td align="center" rowspan="1" colspan="1">4.4</td>
<td align="center" rowspan="1" colspan="1">10.0</td>
<td align="center" rowspan="1" colspan="1">0.007</td>
<td align="center" rowspan="1" colspan="1">5.2</td>
<td align="center" rowspan="1" colspan="1">7.4</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Future prospects</td>
<td align="center" rowspan="1" colspan="1">16.7</td>
<td align="center" rowspan="1" colspan="1">12.9</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">18.0</td>
<td align="center" rowspan="1" colspan="1">11.9</td>
<td align="center" rowspan="1" colspan="1">0.037</td>
</tr>
<tr><td colspan="7" align="left" rowspan="1"><bold>Breast cancer scales QLQ-BR23 – symptoms scales</bold>
</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Systematic therapy side effects</td>
<td align="center" rowspan="1" colspan="1">11.3</td>
<td align="center" rowspan="1" colspan="1">16.9</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">11.3</td>
<td align="center" rowspan="1" colspan="1">16.9</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Breast symptoms</td>
<td align="center" rowspan="1" colspan="1">12.6</td>
<td align="center" rowspan="1" colspan="1">15.9</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">9.3</td>
<td align="center" rowspan="1" colspan="1">18.4</td>
<td align="center" rowspan="1" colspan="1">0.003</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Arm symptoms</td>
<td align="center" rowspan="1" colspan="1">11.3</td>
<td align="center" rowspan="1" colspan="1">16.9</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">9.8</td>
<td align="center" rowspan="1" colspan="1">18.0</td>
<td align="center" rowspan="1" colspan="1">0.008</td>
</tr>
<tr><td align="left" rowspan="1" colspan="1">Upset by hair loss<xref ref-type="table-fn" rid="TF0003">*</xref>
</td>
<td align="center" rowspan="1" colspan="1">8.5</td>
<td align="center" rowspan="1" colspan="1">4.6</td>
<td align="center" rowspan="1" colspan="1">NS</td>
<td align="center" rowspan="1" colspan="1">6.1</td>
<td align="center" rowspan="1" colspan="1">5.9</td>
<td align="center" rowspan="1" colspan="1">NS</td>
</tr>
</tbody>
</table>
<table-wrap-foot><fn id="TF0003"><label>*</label>
<p>Due to a small number of participants who answered the questions from this scale, the result was not considered in interpretation</p>
</fn>
</table-wrap-foot>
</table-wrap>
<p>Within-group comparisons revealed differences in the results obtained in the two measurements. In the experimental group, the index of General health status and quality of life significantly increased (<italic>p</italic>
= 0.048) and Arm symptoms significantly declined (<italic>p</italic>
= 0.046) after the programme. The decrease in the Dyspnoea index in this group in the second measurement was on the borderline of statistical significance (<italic>p</italic>
= 0.059). In the control group, after 10 weeks the results in Social functioning were significantly lower than in the first measurement and we also observed a significant decrease in the Role functioning index (<italic>p</italic>
= 0.045).</p>
</sec>
<sec sec-type="discussion" id="S0005"><title>Discussion</title>
<p>Women who took part in a 10-week rehabilitation programme based on the yoga method experienced positive changes concerning general quality of life, physical and social functioning as well as reduction of difficulties in performing everyday activities. After the programme, women who exercised reported that they suffered less from dyspnoea and discomfort in the arm and breast on the operated side (decreased pain, swelling, sensitivity in the breast area, reduction of pain in the arm or difficulties in raising the arm). They also had better future prospects – they worried less about their health in the future. Reduction of perceived fatigue among exercising women as compared to non-exercising ones in the second measurement was on the borderline of statistical significance. During informal conversations, the participants expressed their satisfaction with the participation in the yoga programme.</p>
<p>We assume that the observed changes – subjective improvement as regards physical functioning, reduction of dyspnoea and discomfort in the area of the operated breast and arm of the operated side and fatigue in particular – resulted from the participation in the yoga programme. This corresponds to previous findings that documented the impact of yoga practice on physical functioning – improvement of physical fitness, flexibility of joints or muscles stamina [<xref rid="CIT0026" ref-type="bibr">26</xref>
].</p>
<p>Dyspnoea is one of the common problems related to cancer. Unfortunately, extant research lacks studies on the influence of yoga on the functioning of the respiratory system among oncological patients. We based our conclusion, that participation in the yoga programme affected the reduction of this aggravating consequence of this disease, on the research conducted on patients suffering from chronic respiratory diseases (asthma, chronic bronchitis, chronic obstructive lung disease). That research revealed a significant influence of exercises based on asanas and pranayama on improvement of the respiratory system functioning, reduction of dyspnoea and the necessity to use medicines [<xref rid="CIT0027" ref-type="bibr">27</xref>
, <xref rid="CIT0028" ref-type="bibr">28</xref>
]. Therefore, the reduction of dyspnoea indicated in our experimental group could be a result of the technique of controlling breath (pranayama) and relaxation exercises practicing during the programme.</p>
<p>Participants of the yoga programme perceived a decrease in discomfort in the arm and breast on the operated side. Weakness or loss of efficiency sensed in the arm, especially when the arm is of the dominant side, constitutes an obstacle to perform work or everyday activities. Thus, such symptoms negatively influence the quality of life of women after breast surgery. Considering rehabilitation, the results indicated effectiveness of the exercises based on asanas in strengthening arms’ muscles, improving the flexibility of the shoulder girdle, stretching the areas where a post-operative cicatrix occurred. The improvement of these dimensions of patients’ quality of life can be also explained with the occurrence of another positive consequence of exercises – namely the reduction of difficulties in everyday functioning (performing daily activities, realising hobbies).</p>
<p>Fatigue constituted another measured consequence of cancer and its treatment that changed after the participation in the yoga programme. Among exercising women, a subjective sense of fatigue decreased. Basing on previous findings stating that yoga reduces fatigue [<xref rid="CIT0020" ref-type="bibr">20</xref>
], we believe a similar phenomenon occurred in our participants, what constitutes another positive result of the proposed yoga programme.</p>
<p>We assume that the improvement in social functioning, especially as regards socializing resulted from the fact that weekly meetings became also a source of social activity for the participants. Additionally, these meetings involved women in a similar health situation what provided them with support and understanding [<xref rid="CIT0018" ref-type="bibr">18</xref>
]. This corresponds to another study that confirmed the impact of yoga classes on participants’ social well-being [<xref rid="CIT0007" ref-type="bibr">7</xref>
]. Whereas, we observed a significant worsening as regards social and everyday functioning between the first and second measurement in non-exercising women.</p>
<p>Exercising women reported that they worried less about their health in the future as compared to the time before the programme. Searching for an explanation to such finding, it is worth turning to yoga's origins. Yoga is a practice of uniting body and mind and its aim is the fullest possible experience of one's condition and state of mind, here and now. It increases mindfulness, which is described as the state of being attentive and aware of what is taking place at present [<xref rid="CIT0029" ref-type="bibr">29</xref>
]. Being mindful is an intentional process of focusing one's attention on what appears in consciousness at the present moment<bold></bold>
. Concentrating on the present decreases anxiety and depression, helps to achieve the state of relaxation. The ability of being ‘here and now’ helps not to think forward – in the case of insecure future of people with diagnosed cancer, it prevents excessive anxiety. Hence, the fact that the exercising women reported to worry less about their health after the programme could result from the mental work performed and practised during yoga classes.</p>
<p>We could not confirm the hypotheses that exercising yoga would impact emotional functioning and body image. Lack of such differences may be that we did not control factors that could regulate emotional functioning of the participants. Moreover, women under the study (both those exercising and non-exercising) got lower scores in emotional functioning and body image as compared to the reference values provided by EORTC [<xref rid="CIT0030" ref-type="bibr">30</xref>
] (analysis not shown). A longer exercising programme could possibly reveal changes in the body perception (e.g. visible weight loss or firming of the body).</p>
<p>A small sample on the one hand may be considered as a limitation but, on the other hand, a small number of exercising participants was optimal to provide them with sufficient space needed to perform exercises and the instructor could pay necessary attention to each woman, taking care of correct performance of asanas. The study was not randomized – all women who volunteered to take part in yoga classes were included in the experimental group. Considering the study's pioneering nature in Poland and the need to encourage women after breast surgery to engage in physical activity, it was important to allow all willing women to participate in the yoga programme. However, we believe, that further research on this issue should involve randomization. The above research also lacked an additional measurement of the studied variables some time after the programme ended. With such data, controlling of other variables, it would be possible to assess whether the observed changes resulted from the exercises and how long the effects pertained.</p>
</sec>
<sec sec-type="conclusions" id="S0006"><title>Conclusions</title>
<p>Considering our results and referring to the previous research, we believe that rehabilitation of patients after breast cancer surgery with the use of yoga constitutes a safe and effective form of activity improving their quality of life. Therefore, we recommend establishing similar exercising rehabilitation programmes dedicated to every woman after breast surgery as well as further assessment of their effectiveness. In Western countries, yoga is a well-acknowledged method of physical and mental regeneration while in Poland by some it is still treated with distrust and caution raised by its unknown and thus, misunderstood cultural and religious origin. However, this aspect is not manifested during yoga practice, its fundamental aim is to practice asanas and ability to relax.</p>
<p>We recommend further research considering the impact of yoga classes on functioning of women after breast cancer surgery in Poland, taking different stages of post-operational rehabilitation into consideration. The real availability of such form of rehabilitation is also worth verifying, so as to make our recommendations possible to implement. Yoga is one of rather expensive forms of recreation and the current groups division considers mainly the level of advancement, physical fitness or some of health limitations experienced by participants (glaucoma, spinal curvature or degeneration, discopathy, etc.). The classes dedicated exclusively to people with their limitations resulting from surgical interventions are rare. We would like more such groups to occur and yoga classes to be placed on the list of reimbursable benefits for women after breast surgery, what would significantly increase their availability.</p>
</sec>
</body>
<back><sec id="S0007"><title>Disclosure</title>
<p>Authors report no conflicts of interest.</p>
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