Dynamic postural stability is not impaired by moderate-intensity physical activity in healthy or balance-impaired older people

Egerton, Thorlene, Brauer, Sandra G. and Cresswell, Andrew G. (2010) Dynamic postural stability is not impaired by moderate-intensity physical activity in healthy or balance-impaired older people. Human Movement Science, 29 6: 1011-1022. doi:10.1016/j.humov.2010.06.001


Author Egerton, Thorlene
Brauer, Sandra G.
Cresswell, Andrew G.
Title Dynamic postural stability is not impaired by moderate-intensity physical activity in healthy or balance-impaired older people
Journal name Human Movement Science   Check publisher's open access policy
ISSN 0167-9457
1872-7646
Publication date 2010-12
Sub-type Article (original research)
DOI 10.1016/j.humov.2010.06.001
Volume 29
Issue 6
Start page 1011
End page 1022
Total pages 12
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2011
Language eng
Abstract Older people are increasingly being encouraged to be more physically active but this may lead to physiological fatigue, tiredness and other effects, which, at high levels, can adversely alter postural stability. However, older adults rarely perform physical activity at high intensities. This study aimed to determine whether a single bout of moderate-intensity physical activity, similar to that experienced during daily living, alters dynamic postural stability, particularly among those at risk of falling. Thirty-one healthy young, 33 healthy older and 21 balance-impaired older, adults performed a rapid, voluntary step-up task before and immediately after a 14 min, self-paced, moderate-intensity physical activity protocol. Timing of step components from vertical ground reaction forces, mediolateral displacement of center of pressure, and onset and amplitude of hip abductor muscle activity were recorded during the step task. All groups demonstrated the same changes after the activity, with slightly shorter weight-shift phase duration, smaller displacement of the center of pressure towards the stance leg during weight shifting, and earlier onset of stance leg gluteus medius activity. These changes indicate improved coordination of the step task after activity. Thus this study showed that dynamic postural stability is not adversely affected immediately following moderate-intensity physical activity, even among balance-impaired elderly. Crown Copyright © 2010 Published by Elsevier B.V. All rights reserved.
Keyword Physical activity
Fatigue
Electromyography
Aging
Postural stability
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Sun, 26 Dec 2010, 00:07:25 EST