Document Detail

Lower body site-specific sarcopenia and accelerometer-determined moderate and vigorous physical activity: the HIREGASAKI study.
MedLine Citation:
PMID:  23211835     Owner:  NLM     Status:  Publisher    
Background and Aims: It is unknown whether the site-specific muscle loss of ageing muscle is associated with accelerometer-determined daily step count and/or the intensity of which the physical activity is completed. The purpose of this study was to examine the relationships between accelerometer-determined physical activity and lower body muscle size in women. Methods: Forty-eight women aged 52 to 76 years had their muscle thickness (MTH) measured by B-mode ultrasound at seven sites on the anterior and posterior aspects of their upper- and lower-leg. Daytime physical activity was measured using an accelerometer on 30 consecutive days and the total duration of each level of exercise intensity (light-PA, moderate-PA and vigorous-PA), average step count, and physical activity-related energy expenditure were calculated. Results: Age was inversely correlated with anterior 30% upper-leg MTH (r = - 0.296, P < 0.05), but not with other measured MTH sites. Light-PA was not significantly (p > 0.05) correlated with measured lower body MTH. However, moderate-PA was correlated (P < 0.05) with lower-leg MTH, while vigorous-PA was correlated (P < 0.05) with lower-leg and anterior 30% upper-leg MTH. Following adjustment for confounding factors, the anterior and posterior lower-leg MTH was positively correlated (P < 0.05) with duration of moderate-PA and vigorous-PA, as well as average step count. Conclusions: Thus daily moderate and vigorous physical activity was associated with higher muscle mass in the lower leg, but not in the upper-leg muscle, suggesting that the site-specific upper-leg muscle loss may not be prevented or attenuated by daily physical activity.
Takashi Abe; Naotoshi Mitsukawa; Robert S Thiebaud; Jeremy P Loenneke; Mark Loftin; Madoka Ogawa
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-26
Journal Detail:
Title:  Aging clinical and experimental research     Volume:  -     ISSN:  1720-8319     ISO Abbreviation:  Aging Clin Exp Res     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-12-5     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101132995     Medline TA:  Aging Clin Exp Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Health, Exercise Sciences, & Recreation Management, University of Mississippi, USA.
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