Document Detail

Alterations in ventilation and gas exchange during exercise-induced carbohydrate depletion.
MedLine Citation:
PMID:  487269     Owner:  NLM     Status:  MEDLINE    
The relationship between ventilation (VE), oxygen consumption (VO2), and carbon dioxide production (VCO2) during work were studied in four trained males during exercise-induced carbohydrate depletion. Repeated bouts of heavy treadmill exercise (6 min at 95% VO2 max) were performed once per hour for 24 h in order to promote a shift in energy substrate from carbohydrate to fat. Measurements of VO2 and VCO2 recorded during each minute indicated that VO2 was unaffected by the number of runs, whereas VCO2 showed a progressive reduction which amounted to 24% during the final run. A corresponding decline of 19% was observed in the respiratory exchange ratio. No significant change in VE occurred between any of the runs. It is concluded that during heavy, repeated, muscular exercise, reductions in VO2, strongly suggestive of an increased fat oxidation, are not accompanied by a corresponding change in ventilation.
H Green; M Houston; J Thomson; P Reid
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Canadian journal of physiology and pharmacology     Volume:  57     ISSN:  0008-4212     ISO Abbreviation:  Can. J. Physiol. Pharmacol.     Publication Date:  1979 Jun 
Date Detail:
Created Date:  1979-12-27     Completed Date:  1979-12-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0372712     Medline TA:  Can J Physiol Pharmacol     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  615-8     Citation Subset:  IM; S    
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MeSH Terms
Carbohydrate Metabolism*
Carbon Dioxide
Oxygen Consumption*
Physical Exertion*
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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