PittsburghV1, Canada, Analysis, bibRecord, 000038

Walking Energetics, Fatigability, and Fatigue in Older Adults: The Study of Energy and Aging Pilot

Identifieur interne : 000038 ( Canada/Analysis ); précédent : 000037; suivant : 000039

Walking Energetics, Fatigability, and Fatigue in Older Adults: The Study of Energy and Aging Pilot

Auteurs : Catherine A. Richardson [Canada] ; Nancy W. Glynn ; Luigi G. Ferrucci ; Dawn C. Mackey [Canada]

Source :

The Journals of Gerontology Series A: Biological Sciences and Medical Sciences [ 1079-5006 ] ; 2014.

RBID : PMC:4447797

Descripteurs français

KwdFr :
- Canada (épidémiologie), Consommation d'oxygène, Démarche, Effort physique, Enquêtes et questionnaires, Fatigue (épidémiologie), Femelle, Humains, Marche à pied, Mobilité réduite, Mâle, Pronostic, Prévalence, Sujet âgé, Sujet âgé de 80 ans ou plus, Vieillissement, Épreuve d'effort, Évaluation de l'incapacité, Évaluation gériatrique ().
MESH :
- épidémiologie : Canada, Fatigue.
- Consommation d'oxygène, Démarche, Effort physique, Enquêtes et questionnaires, Femelle, Humains, Marche à pied, Mobilité réduite, Mâle, Pronostic, Prévalence, Sujet âgé, Sujet âgé de 80 ans ou plus, Vieillissement, Épreuve d'effort, Évaluation de l'incapacité, Évaluation gériatrique.
Wicri :
- geographic : Canada.

English descriptors

KwdEn :
- Aged, Aged, 80 and over, Aging, Canada (epidemiology), Disability Evaluation, Exercise Test, Fatigue (epidemiology), Female, Gait, Geriatric Assessment (methods), Humans, Male, Mobility Limitation, Oxygen Consumption, Physical Exertion, Prevalence, Prognosis, Surveys and Questionnaires, Walking.
MESH :
- geographic , epidemiology : Canada.
- epidemiology : Fatigue.
- methods : Geriatric Assessment.
- Aged, Aged, 80 and over, Aging, Disability Evaluation, Exercise Test, Female, Gait, Humans, Male, Mobility Limitation, Oxygen Consumption, Physical Exertion, Prevalence, Prognosis, Surveys and Questionnaires, Walking.

Abstract

Background.

Slow gait speed increases morbidity and mortality in older adults. We examined how preferred gait speed is associated with energetic requirements of walking, fatigability, and fatigue.

Methods.

Older adults (n = 36, 70–89 years) were categorized as slow or fast walkers based on median 400-m gait speed. We measured VO₂peak by graded treadmill exercise test and VO₂ during 5-minute treadmill walking tests at standard (0.72 m/s) and preferred gait speeds. Fatigability was assessed with the Situational Fatigue Scale and the Borg rating of perceived exertion at the end of walking tests. Fatigue was assessed by questionnaire.

Results.

Preferred gait speed over 400 m (range: 0.75–1.58 m/s) averaged 1.34 m/s for fast walkers versus 1.05 m/s for slow walkers (p < .001). VO₂peak was 26% lower (18.5 vs 25.1ml/kg/min, p = .001) in slow walkers than fast walkers. To walk at 0.72 m/s, slow walkers used a larger percentage of VO₂peak (59% vs 42%, p < .001). To walk at preferred gait speed, slow walkers used more energy per unit distance (0.211 vs 0.186ml/kg/m, p = .047). Slow walkers reported higher rating of perceived exertion during walking and greater overall fatigability on the Situational Fatigue Scale, but no differences in fatigue.

Conclusions.

Slow walking was associated with reduced aerobic capacity, greater energetic cost of walking, and greater fatigability. Interventions to improve aerobic capacity or decrease energetic cost of walking may prevent slowing of gait speed and promote mobility in older adults.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4447797

DOI: 10.1093/gerona/glu146
PubMed: 25190069
PubMed Central: 4447797

Affiliations:

Canada

Links to Exploration step

PMC:4447797

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<front><div type="abstract" xml:lang="en"><sec><title>Background.</title>
<p>Slow gait speed increases morbidity and mortality in older adults. We examined how preferred gait speed is associated with energetic requirements of walking, fatigability, and fatigue.</p>
</sec>
<sec><title>Methods.</title>
<p>Older adults (<italic>n</italic>
 = 36, 70–89 years) were categorized as slow or fast walkers based on median 400-m gait speed. We measured VO<sub>2</sub>
peak by graded treadmill exercise test and VO<sub>2</sub>
 during 5-minute treadmill walking tests at standard (0.72 m/s) and preferred gait speeds. Fatigability was assessed with the Situational Fatigue Scale and the Borg rating of perceived exertion at the end of walking tests. Fatigue was assessed by questionnaire.</p>
</sec>
<sec><title>Results.</title>
<p>Preferred gait speed over 400 m (range: 0.75–1.58 m/s) averaged 1.34 m/s for fast walkers versus 1.05 m/s for slow walkers (<italic>p</italic>
 < .001). VO<sub>2</sub>
peak was 26% lower (18.5 vs 25.1ml/kg/min, <italic>p</italic>
 = .001) in slow walkers than fast walkers. To walk at 0.72 m/s, slow walkers used a larger percentage of VO<sub>2</sub>
peak (59% vs 42%, <italic>p</italic>
 < .001). To walk at preferred gait speed, slow walkers used more energy per unit distance (0.211 vs 0.186ml/kg/m, <italic>p</italic>
 = .047). Slow walkers reported higher rating of perceived exertion during walking and greater overall fatigability on the Situational Fatigue Scale, but no differences in fatigue.</p>
</sec>
<sec><title>Conclusions.</title>
<p>Slow walking was associated with reduced aerobic capacity, greater energetic cost of walking, and greater fatigability. Interventions to improve aerobic capacity or decrease energetic cost of walking may prevent slowing of gait speed and promote mobility in older adults.</p>
</sec>
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Walking Energetics, Fatigability, and Fatigue in Older Adults: The Study of Energy and Aging Pilot

Walking Energetics, Fatigability, and Fatigue in Older Adults: The Study of Energy and Aging Pilot

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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