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Age-related differences in muscle power during single-step balance recovery.

Authors
Madigan-ML
Source
J Appl Biomech 2006 Aug; 22(3):186-193
NIOSHTIC No.
20031558
Abstract
The purpose of this study was to investigate age-related differences in muscle power during a surrogate task of trip recovery. Participants included 10 healthy young men (19-23 years old) and 10 healthy older men (65-83). The task involved releasing participants from a forward-leaning posture. After release, participants attempted to recover their balance using a single step of the right foot. Muscle power at the hip, knee, and ankle of the stepping limb were determined from the product of joint angular velocity and joint torque. Muscle powers during balance recovery followed a relatively consistent pattern in both young and older men, and showed effects of both lean and age. Interestingly, the effects of age did not always involve smaller peak power values in the older men as expected from the well-documented loss of muscle power with aging. Older men exhibited smaller peak muscle power at the knee and larger peak muscle power at the ankle and hip compared to young men. The increases in muscle power at the ankle and hip may result from a neuromuscular adaptation aimed at improving balance recovery ability by compensating for the age-related loss of muscle function.
Keywords
Humans; Musculoskeletal-system; Muscle-function; Biomechanics; Age-factors
Contact
Department of Engineering Science and Mechanics, Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 20461
CODEN
JABOEG
Publication Date
20060801
Document Type
Journal Article
Funding Type
Grant
Fiscal Year
2006
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R03-OH-007821
Issue of Publication
3
ISSN
1065-8483
Source Name
Journal of Applied Biomechanics
State
VA
Performing Organization
Virginia Polytechnic Institute and State University
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