Document Detail


The influence of exercise-induced plasma volume changes on the interpretation of biochemical parameters used for monitoring exercise, training and sport.
MedLine Citation:
PMID:  9777683     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A number of studies have demonstrated considerable plasma volume changes during and after exposure to different environmental and physiological conditions. These changes are thought to result from transient fluid shifts into (haemodilution) and out of (haemoconcentration) the intravascular space. If the levels of plasma constituents are to be routinely measured for research purposes or used as indicators of training adaptation or the health of an athlete, then it is important to consider the dynamic nature of plasma volume. Controversy still exists over the relevance of plasma volume interactions with plasma constituent levels, and while some investigators have taken plasma volume shifts into account, others have chosen to ignore these changes. Bouts of acute exercise have been shown to produce a transient haemoconcentration immediately after long distance running, bicycle ergometry and both maximal and submaximal swimming exercise. While these changes are transient, lasting only a few hours, other studies have reported a longer term haemodilution following acute exercise. In addition, endurance training has been shown to cause long term expansion of the plasma volume. It would, therefore, seem important to consider the influence of plasma volume changes on plasma solutes routinely measured for research, and as markers of training adaptation, prior to arriving at conclusions and recommendations based purely on their measured plasma level. To further confound this issue, plasma volume changes are known to be associated with heat acclimatisation, hydration state, physical training and postural changes, all of which may differ from one experiment or exercise bout to the next, and should thus be taken into account.
Authors:
S Kargotich; C Goodman; D Keast; A R Morton
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Sports medicine (Auckland, N.Z.)     Volume:  26     ISSN:  0112-1642     ISO Abbreviation:  Sports Med     Publication Date:  1998 Aug 
Date Detail:
Created Date:  1998-11-30     Completed Date:  1998-11-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8412297     Medline TA:  Sports Med     Country:  NEW ZEALAND    
Other Details:
Languages:  eng     Pagination:  101-17     Citation Subset:  IM; S    
Affiliation:
Department of Microbiology, University of Western Australia, QE II Medical Centre, Nedlands, Australia.
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MeSH Terms
Descriptor/Qualifier:
Blood Chemical Analysis*
Exercise / physiology*
Hormones / blood,  physiology
Hot Temperature
Humans
Monitoring, Physiologic
Physical Fitness / physiology
Plasma Volume / physiology*
Posture / physiology
Sports / physiology*
Water-Electrolyte Balance / physiology
Chemical
Reg. No./Substance:
0/Hormones

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


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