Aging impairs the recovery in mechanical muscle function following 4days of disuse

As aged individuals are frequently exposed to short-term disuse caused by disease or musculoskeletal injury, it is important to understand how short-term disuse and subsequent retraining affect lower limb mechanical muscle function. The purpose of the present study was, therefore, to investigate the...

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Bibliographic Details
Published in:Experimental gerontology 2014-04, Vol.52, p.1-8
Main Authors: Hvid, L.G., Suetta, C., Nielsen, J.H., Jensen, M.M., Frandsen, U., Ørtenblad, N., Kjaer, M., Aagaard, P.
Format: Article
Language:English
Subjects:
Aging
Disuse
Immobilization
Muscle function
Physical function
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Summary:As aged individuals are frequently exposed to short-term disuse caused by disease or musculoskeletal injury, it is important to understand how short-term disuse and subsequent retraining affect lower limb mechanical muscle function. The purpose of the present study was, therefore, to investigate the effect of 4days of lower limb disuse followed by 7days of active recovery on mechanical muscle function of the knee extensors in young (24.3±0.9years, n=11) and old (67.2±1.0years, n=11) recreationally active healthy males. Slow and moderate dynamic muscle strength were assessed using isokinetic dynamometry (60 and 180°s−1, respectively) along with isometric muscle strength and rapid muscle force capacity examined as contractile rate of force development (RFD), Impulse, and relative RFD (rRFD) during the initial phase of contraction (100ms time interval relative to onset of contraction). Prior to disuse, marked age-related differences (p
ISSN:0531-5565
1873-6815
DOI:10.1016/j.exger.2014.01.012