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espace at MMU > Research Institutes > Institute for Biomedical Research into Human Movement and Health > Institute for Biomedical Research into Human Movement and Health > Preservation of eccentric strength in older adults: evidence, mechanisms and implications for training and rehabilitation.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2173/109466
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Title: Preservation of eccentric strength in older adults: evidence, mechanisms and implications for training and rehabilitation.
Authors: Roig, Marc
Macintyre, Donna L.
Eng, Janice J
Narici, Marco V.
Maganaris, Constantinos N.
Reid, W. Darlene
Citation: Experimental gerontology, 2010, vol. 45, no. 6, pp. 400-9
Publisher: Elsevier
Issue Date: Jun-2010
URI: http://hdl.handle.net/2173/109466
DOI: 10.1016/j.exger.2010.03.008
PubMed ID: 20303404
Additional Links: http://www.elsevier.com/locate/expgero
Abstract: Overall reductions in muscle strength typically accompany the aging process. However, older adults show a relatively preserved capacity of producing eccentric strength. The preservation of eccentric strength in older adults is a well-established phenomenon, occurring indiscriminately across different muscle groups, independent of age-related architectural changes in muscle structure and velocity of movement. The mechanisms for the preservation of eccentric strength appear to be mechanical and cellular in origin and include both passive and active elements regulating muscle stiffness. The age-related accumulation of non-contractile material in the muscle-tendon unit increases passive stiffness, which might offer mechanical advantage during eccentric contractions. In addition, the preserved muscle tension and increased instantaneous stiffness of old muscle fibers during stretch increase active stiffness, which might enhance eccentric strength. The fact that the preservation of eccentric strength is present in people with chronic conditions when compared to age-matched healthy controls indicates that the aging process per se does not exclusively mediate the preservation of eccentric strength. Physical inactivity, which is common in elderly and people with chronic conditions, is a potential factor regulating the preservation of eccentric strength. When compared to concentric strength, the magnitude of preservation of eccentric strength in older adults ranges from 2% to 48% with a mean value of 21.6% from all studies. This functional reserve of eccentric strength might be clinically relevant, especially to initiate resistance training and rehabilitation programs in individuals with low levels of strength.
Type: Article
Language: en
Description: Full-text of this article is not available in this e-prints service. This article was originally published following peer-review in Experimental Gerontology, published by and copyright Elsevier.
Keywords: Aging
Skeletal muscle
Sarcopenia
Eccentric contraction
Strength
MeSH: Aged
Aged, 80 and over
Aging
Female
Humans
Male
Muscle Contraction
Muscle Fibers, Skeletal
Muscle Strength
Sarcopenia
ISSN: 1873-6815
0531-5565
Appears in Collections: Institute for Biomedical Research into Human Movement and Health

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