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Cited by 546

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Contractile changes in opposing muscles of the human ankle joint with aging

Vandervoort, A. A., McComas, A. J.·1986·Journal of Applied Physiology
DOI 10.1152/jappl.1986.61.1.361
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Abstract

The effects of aging on maximal voluntary strength and on the isometric twitch were determined in the ankle dorsiflexor and plantarflexor muscles of 111 healthy men and women aged 20–100 yr. Men were found to be stronger than women at all ages. In both sexes, the average values for maximum voluntary strength of the dorsiflexors and plantarflexors began to decline in the 6th decade. Although the absolute loss of strength was greater for the plantarflexor muscles, the relative losses were similar in the two muscle groups. During maximum voluntary effort, stimulation of motor nerves produced no additional torque in the majority of elderly men and women, indicating that these subjects remained able to utilize their descending motor pathways for optimal muscle activation. Comparisons of muscle compound action potentials, twitch torques, and muscle cross-sectional areas suggested that a decrease in excitable muscle mass was entirely responsible for the lower strength of the elderly. An additional effect of aging was the gradual prolongation of twitch contraction and half-relaxation times throughout the adult life-span.

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Metadata

Authors
Vandervoort, A. A., & McComas, A. J.
Venue
Journal of Applied Physiology
Publisher
American Physiological Society
Published
1986-07-01
Volume
61
Issue
1
Pages
361-367
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
DOI
10.1152/jappl.1986.61.1.361
OpenAlex
W2205573324
Cited by
546
References
0
FWCI
1.11
Type
journal article
Language
en
Open access
closed

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