Document Detail

Muscle oxygenation trends during dynamic exercise measured by near infrared spectroscopy.
MedLine Citation:
PMID:  15328597     Owner:  NLM     Status:  MEDLINE    
During the last decade, NIRS has been used extensively to evaluate the changes in muscle oxygenation and blood volume during a variety of exercise modes. The important findings from this research are as follows: (a) There is a strong correlation between the lactate (ventilatory) threshold during incremental cycle exercise and the exaggerated reduction in muscle oxygenation measured by NIRS. (b) The delay in steady-state oxygen uptake during constant work rate exercise at intensities above the lactate/ventilatory threshold is closely related to changes in muscle oxygenation measured by NIRS. (c) The degree of muscle deoxygenation at the same absolute oxygen uptake is significantly lower in older persons compared younger persons; however, these changes are negated when muscle oxygenation is expressed relative to maximal oxygen uptake values. (d) There is no significant difference between the rate of biceps brachii and vastus lateralis deoxygenation during arm cranking and leg cycling exercise, respectively, in males and females. (e) Muscle deoxygenation trends recorded during short duration, high-intensity exercise such as the Wingate test indicate that there is a substantial degree of aerobic metabolism during such exercise. Recent studies that have used NIRS at multiple sites, such as brain and muscle tissue, provide useful information pertaining to the regional changes in oxygen availability in these tissues during dynamic exercise.
Yagesh N Bhambhani
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Canadian journal of applied physiology = Revue canadienne de physiologie appliquée     Volume:  29     ISSN:  1066-7814     ISO Abbreviation:  Can J Appl Physiol     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-08-25     Completed Date:  2005-03-17     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  9306274     Medline TA:  Can J Appl Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  504-23     Citation Subset:  IM    
Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada.
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MeSH Terms
Adipose Tissue / metabolism
Exercise / physiology*
Exercise Tolerance
Muscle, Skeletal / metabolism*
Oxygen Consumption*
Spectroscopy, Near-Infrared*

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