Journals of Gerontology Series A: Biological Sciences and Medical Sciences Large Type Edition
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The Journals of Gerontology Series A: Biological Sciences and Medical Sciences 55:M192-M199 (2000)
© 2000 The Gerontological Society of America

Association of Muscle Power With Functional Status in Community-Dwelling Elderly Women

Mona Foldvaria, Maureen Clarka, Lori C. Laviolettea, Melissa A. Bernsteina, David Kalitona,c, Carmen Castanedaa, Charles T. Pua, Jeffrey M. Hausdorffc, Roger A. Fieldinga,b and Maria A. Fiatarone Singha,d

a Nutrition, Exercise Physiology, and Sarcopenia Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts
b Department of Health Sciences, Sargent College of Health and Rehabilitation Sciences, Boston University, Massachusetts
c Gerontology Division, Beth Israel Deaconess Medical Center, Boston, Massachusetts
d School of Exercise and Sport Science, University of Sydney, Australia

Mona Foldvari, Human Nutrition Research Center on Aging, 711 Washington Street, Boston, MA 02111 E-mail: mfoldvari{at}hnrc.tufts.edu.

Decision Editor: William B. Ershler, MD

Background. Identification of the physiologic factors most relevant to functional independence in the elderly population is critical for the design of effective interventions. It has been suggested that muscle power may be more directly related to impaired physical performance than muscle strength in elderly persons. We tested the hypothesis that peak muscle power is closely associated with self-reported functional status in sedentary elderly community-dwelling women.

Methods. We used baseline data that were collected as part of a 1-year randomized controlled clinical trial of a combined program of strength, power, and endurance training in 80 elderly women (mean age 74.8 ± 5.0 years) with 3.2 ± 1.9 chronic diseases, selected for baseline functional impairment and/or falls.

Results. Functional status at baseline was related in univariate analyses to physiologic capacity, habitual physical activity level, neuropsychological status, and medical diagnoses. Leg power had the strongest univariate correlation to self-reported functional status r p of any of the physiologic factors we tested. In a forward stepwise regression model, leg press power and habitual physical activity level were the only two factors that contributed independently to functional status r p , accounting for 40% of the variance in functional status.

Conclusions. Leg power is a strong predictor of self-reported functional status in elderly women.




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