Document Detail


Gas exchange analysis of immediate CO2 storage at onset of exercise.
MedLine Citation:
PMID:  3922028     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The immediate storage of CO2 at the onset of exercise was estimated in 5 subjects as the difference between measured and predicted CO2 production at work rates of 33, 53 and 75% VO2max. Three time varying models of respiratory exchange ratio (RER) were used to obtain an expected range of predicted CO2 production. Calculated CO2 storage in the transition from rest to 33% VO2max ranged from 0.33 to 0.38 ml X kg-1 X torr-1; from 33 to 53% VO2max, corresponding values were -0.04 to 0.14 ml X kg-1 X torr-1; and, from 53 to 75% VO2max, values ranged from -0.25 to 0.16 ml X kg-1 X torr-1. In two models, CO2 storage decreased significantly at the highest work rate. Estimates of CO2 storage by hyperventilation in the steady state of exercise yielded significantly greater storage. It was concluded that immediate CO2 storage at the onset of exercise was less than hyperventilation estimates, and that it tended to decrease with metabolic acidosis.
Authors:
R L Hughson; M D Inman
Related Documents :
4055568 - Control of exercise hyperpnea during hypercapnia in humans.
665718 - Comparison of the ventilation response to co2 rebreathing in healthy smokers and nonsmo...
3090508 - In vivo response times for a heated skin surface co2 electrode during rest and exercise.
8297938 - Effects of a continuous infusion of tris(hydroxymethyl)aminomethane on acidosis, oxygen...
3892628 - A critical review of the literature on ratings scales for perceived exertion.
19714358 - Effect of gender on fuel utilization during exercise at different intensities in untrai...
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Respiration physiology     Volume:  59     ISSN:  0034-5687     ISO Abbreviation:  Respir Physiol     Publication Date:  1985 Mar 
Date Detail:
Created Date:  1985-06-20     Completed Date:  1985-06-20     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0047142     Medline TA:  Respir Physiol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  265-78     Citation Subset:  IM; S    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Carbon Dioxide / metabolism*
Female
Humans
Hyperventilation / metabolism
Lactates / blood
Male
Oxygen Consumption
Physical Exertion*
Pulmonary Gas Exchange*
Chemical
Reg. No./Substance:
0/Lactates; 124-38-9/Carbon Dioxide

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


Previous Document:  Mechanical response of rabbit myocardium and coronary arteries to leukotriene D4. Failure to demonst...
Next Document:  Measurement of mixed venous carbon dioxide pressure by rebreathing during exercise.