Document Detail


Wrist strength is dependent on simultaneous power grip intensity.
MedLine Citation:
PMID:  18803097     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of grip activities on wrist flexion/extension strength was examined. Twelve healthy subjects performed maximum wrist flexion/extension exertions with one of five levels of simultaneous grip effort: minimum effort; preferred effort; 30%, 60% and 100% maximum voluntary contraction. As grip force increased from the minimum to the maximum effort, average wrist flexion strength increased 34% and average wrist extension strength decreased 10%. It appears that the finger flexor tendons on the volar aspect of the wrist act agonistically in wrist flexion and act antagonistically to wrist extension. When an object gripped by the hand is fragile or uncomfortable, the reduced finger flexor activity will limit wrist flexion strength. Gripping a slippery object that requires high grip effort will result in reduced wrist extension strength. Grip force should be controlled during measurement of wrist flexion or extension strength. When analysing a task that involves both grip and wrist exertions, use of grip/wrist strength values that were measured during grip exertions only, or wrist exertions only, may incorrectly estimate the true grip/wrist strength, as grip and wrist activities significantly interact with each other as demonstrated in this paper.
Authors:
Na Jin Seo; Thomas J Armstrong; James A Ashton-Miller; Don B Chaffin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Ergonomics     Volume:  51     ISSN:  0014-0139     ISO Abbreviation:  Ergonomics     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-09-22     Completed Date:  2009-01-08     Revised Date:  2013-06-14    
Medline Journal Info:
Nlm Unique ID:  0373220     Medline TA:  Ergonomics     Country:  England    
Other Details:
Languages:  eng     Pagination:  1594-605     Citation Subset:  IM; S    
Affiliation:
Department of Industrial and Operations Engineering, University of Michigan, Ann Arbor, MI 48109, USA. najins@umich.edu
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Biomechanics
Electromyography
Female
Hand Strength / physiology*
Humans
Male
Models, Biological
Range of Motion, Articular / physiology
Wrist Joint / physiology*
Young Adult
Grant Support
ID/Acronym/Agency:
P30 AG024824/AG/NIA NIH HHS

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


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