Document Detail

Postural stability in altered and unaltered sensory environments following fatiguing exercise of lower extremity joints.
MedLine Citation:
PMID:  18248536     Owner:  NLM     Status:  MEDLINE    
Investigations of postural recovery following controlled external perturbations have provided models for healthy and pathological balance behavior. Less work, however, has investigated postural responses related to internal perturbations of the balance system. In this study, lower extremity joint (knee, or ankle) and overall fatigue of the dominant leg provided the internal perturbations to the balance system. Postural sway was examined during unilateral dominant leg standing before and immediately following fatiguing exercise, as well as at 10, 20, and 30 min post-fatigue activity. Sway was measured in both firm and sway-referenced support surface (external perturbation) conditions. Both joint-localized fatigue and overall fatigue were found to induce impairments in postural control, which were further exacerbated by external postural perturbations. Follow-up pairwise comparisons indicated that these impairments persisted at 10 and 30 min post-fatigue. No differences in postural sway were found between fatigue locations or across any interactions between sway and fatigue location. The results indicated that muscular fatigue imposed a prolonged internal perturbation to postural control, regardless of any individual or combined joint fatigue localization. This global effect, combined with the prolonged impairment in postural response, provides support for critical contributions from a central mechanism to postural deficits due to fatigue.
D C Dickin; J B Doan
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Publication Detail:
Type:  Journal Article     Date:  2008-02-02
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  18     ISSN:  1600-0838     ISO Abbreviation:  Scand J Med Sci Sports     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-12-05     Completed Date:  2009-03-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  765-72     Citation Subset:  IM    
Department of Health, Physical Education, Recreation and Dance, University of Idaho, Moscow, Idaho 83844-2401, USA.
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MeSH Terms
Joint Instability*
Lower Extremity / physiology*
Muscle Fatigue / physiology*
Physical Exertion / physiology*
Postural Balance / physiology*
Young Adult

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

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