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J Aging Health. 2011 Mar;23(2):313-28. doi: 10.1177/0898264310388562. Epub 2010 Nov 16.

Association between muscle mass, leg strength, and fat mass with physical function in older adults: influence of age and sex.

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  • 1School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada. danielle.bouchard@usherbrooke.ca

Abstract

OBJECTIVE:

The purposes of this study were to determine the relationship between muscle mass, muscle strength, muscle quality, and fat mass with a composite measure of physical function in older adults, and to determine whether these relations differed by age and sex.

METHOD:

Participants consisted of 1280 adults aged ≥ 55 yr from the NHANES study. Reduced rank regression was used to identify patterns of muscle mass, muscle strength, muscle quality, and fat mass related to physical function.

RESULTS:

A single relevant pattern emerged that included leg strength and fat mass as predictors of the 7 physical function variables. The leg strength loading was significantly greater than the fat mass loading in men and women aged 55-64 and ≥ 75, and differed between sexes.

CONCLUSION:

Leg strength and fat mass best predict physical function in older adults and the relative importance varies according to age and sex.

[PubMed - indexed for MEDLINE]
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