This study was supported by National Institute on Aging Contract 263-MA-202876, R01-AG18844, Roybal Center for the Enhancement of Late-Life Function Grant P50-A11669, and a National Institute on Disability and Rehabilitation Research Post-Doctoral Fellowship in Health Services Research (H133P99004) to Dr. Sayers.
Effect of Leg Muscle Contraction Velocity on Functional Performance in Older Men and Women
Article first published online: 24 FEB 2005
Journal of the American Geriatrics Society
Volume 53, Issue 3, pages 467–471, March 2005
How to Cite
Sayers, S. P., Guralnik, J. M., Thombs, L. A. and Fielding, R. A. (2005), Effect of Leg Muscle Contraction Velocity on Functional Performance in Older Men and Women. Journal of the American Geriatrics Society, 53: 467–471. doi: 10.1111/j.1532-5415.2005.53166.x
- Issue published online: 24 FEB 2005
- Article first published online: 24 FEB 2005
- skeletal muscle strength;
- contraction velocity;
Objectives: To explore the relationship between impairment (skeletal muscle strength and contraction velocity) and function in community-dwelling older adults.
Setting: University-based human physiology laboratory.
Participants: One hundred one men and women (aged 75–90).
Measurements: Muscle strength and contraction velocity during bilateral leg press (LP) were calculated during one-repetition maximum (1RM) and 40% 1RM. A short physical performance battery (SPPB) and gait speed (GS) from a 400-m self-paced walk assessed function. Sex differences in LP strength and contraction velocity (at 40% 1RM) were assessed. The relationship between these variables and function was also examined.
Results: Lower extremity strength and contraction velocity were significantly associated with GS (P=.02 and P=.005, respectively) and SPPB (P<.001 and P=.009, respectively) in men only. Contraction velocity, but not muscle strength, was significantly associated with GS (P<.001) and SPPB (P=.02) in women.
Conclusion: Sex differences exist in the relationship between impairment (muscle strength and contraction velocity) and function. Older men and women may employ different strategies to achieve success on different functional tasks. These findings may have important implications for clinicians practicing geriatric rehabilitation.