Document Detail

Immobilization effects in young and older adults.
MedLine Citation:
PMID:  16369818     Owner:  NLM     Status:  MEDLINE    
This experiment compared the effects of disuse on the adductor pollicis (AP) muscle in young (YM) and old (OM) men. The AP of the YM and OM was assessed for strength (MVC), compound muscle action potential (CMAP), and volume, and then immobilized for 2 weeks. MVC decreased approximately 22% in the YM, and OM (P<0.001). AP volume was 4.1% (not significant) and 9.5% (P<0.05) less in the YM and OM, respectively. CMAP increased in the OM 0, 24, and 48 h post-immobilization, and did not change in the YM. However, the YM showed a greater decrease in specific force as compared to the OM. YM and OM experienced similar losses in strength, yet muscle volume loss was only significant in OM. Although OM are more susceptible to immediate losses in muscle volume, muscle activation strategies appear to preserve strength during atrophy.
M L Urso; P M Clarkson; T B Price
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-12-21
Journal Detail:
Title:  European journal of applied physiology     Volume:  96     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-03-14     Completed Date:  2006-06-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  564-71     Citation Subset:  IM    
Department of Exercise Science, University of Massachusetts, 30 Eastman Lane, 110 Totman Building, Amherst, MA, 01003, USA.
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MeSH Terms
Aging / physiology*
Analysis of Variance
Evoked Potentials, Motor / physiology
Immobilization / physiology*
Middle Aged
Muscle Contraction / physiology
Muscle, Skeletal / pathology,  physiology*
Muscular Atrophy / pathology,  physiopathology*
Thumb / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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