Document Detail

Exercise and dehydration: A possible role of inner ear in balance control disorder.
MedLine Citation:
PMID:  20797876     Owner:  NLM     Status:  MEDLINE    
To study the effect of exercise and dehydration on the postural sensory-motor strategies, 10 sportsmen performed a 45 min-exercise on a cycle ergometer at intensity just below the ventilatory threshold without fluid intake. They performed, before, immediately and 20 min after exercise, a sensory organization test to evaluate balance control in six different sensory situations, that combine three visual conditions (eyes open, eyes closed and sway-referenced visual surround motion) with two platform conditions (stable platform, sway-referenced platform motion). Blood samples were collected before and after exercise. Exercise induced a mild dehydration, characterized by body mass loss and increase in proteinemia. Postural performances decreased immediately after exercise, mainly in the standard situation (eyes open, stable visual surround and platform) and when only the vestibular cue was reliable (eyes closed and sway-referenced platform). Moreover, the decreased use of vestibular input was correlated with the dehydration level. Finally, postural performances normalized 20 min after exercise. Even though muscular fatigue could explain the decrease in postural performances, vestibular fluid modifications may also be involved by its influence on the intralabyrinthine homeostasis, lowering thus the contribution of vestibular information on balance control.
Alexis Lion; Gilles Bosser; Gérome C Gauchard; Karim Djaballah; Jean-Pierre Mallié; Philippe P Perrin
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Publication Detail:
Type:  Journal Article     Date:  2010-08-24
Journal Detail:
Title:  Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology     Volume:  20     ISSN:  1873-5711     ISO Abbreviation:  J Electromyogr Kinesiol     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-09-29     Completed Date:  2011-01-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9109125     Medline TA:  J Electromyogr Kinesiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1196-202     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Ltd. All rights reserved.
Balance Control and Motor Performance (EPM), UFR STAPS, Henri Poincaré University, Nancy-University, 54600 Villers-lès-Nancy, France.
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MeSH Terms
Dehydration / physiopathology*
Ear, Inner / physiopathology*
Exercise / physiology*
Exercise Test
Postural Balance / physiology
Posture / physiology*
Vestibule, Labyrinth / physiology
Visual Perception / physiology*

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