Document Detail


Ventilatory response to erect and supine exercise.
MedLine Citation:
PMID:  10527315     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To test the hypothesis that altering the ventilation-perfusion ratio of the lung by changing the body position from erect to supine would alter the ventilatory response to exercise as described by the slope of the relationship between minute ventilation and carbon dioxide production. METHODS: Ten normal subjects volunteers (5 female, 5 male: average age 22 yr; range 19-25 yr; height (SD) 173.5 (3.8) cm; weight 68.0 (3.3) kg) performed in random order erect and supine incremental cycle exercise with metabolic gas exchange measurements to determine peak oxygen consumption (VO2) and the slope of the relation between ventilation and carbon dioxide production (VE/VCO2 slope). RESULTS: Subjects reached a higher peak VO2 when erect (mean (SEM))(39.2 (2.4) vs 35.7 (2.0); P < 0.05). Heart rate, ventilation, and VO2 were higher at each stage in the erect position. The respiratory exchange ratio was the same in each position at matched workloads and at peak exercise. The VE/VCO2 slope was unchanged (27.8 (2.2) erect vs 27.7 (1.9) erect). CONCLUSION: Cycle exercise in the erect position is associated with an increase in exercise capacity compared with supine exercise but with no associated changes in ventilatory response to carbon dioxide production.
Authors:
K E Terkelsen; A L Clark; W S Hillis
Related Documents :
3595075 - Arterial oxygen saturation and breathlessness in patients with chronic obstructive airw...
3108465 - End-tidal carbon dioxide as a measure of arterial carbon dioxide during intermittent ma...
8000355 - Neural drives to breathing during exercise.
2113905 - Sensation of dyspnea during hypercapnia, exercise, and voluntary hyperventilation.
512295 - A study on the lethal toxicity of aminocarb to freshwater crayfish and its in vivo meta...
3605315 - Effects of graduated compression stockings on blood lactate following an exhaustive bou...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  31     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1999 Oct 
Date Detail:
Created Date:  1999-11-16     Completed Date:  1999-11-16     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1429-32     Citation Subset:  IM; S    
Affiliation:
Department of Medicine, University of Glasgow, United Kingdom.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Bicycling / physiology
Exercise / physiology*
Female
Humans
Male
Oxygen Consumption / physiology
Posture*
Ventilation-Perfusion Ratio / physiology*

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


Previous Document:  Ventilatory responses during experimental cycle-run transition in triathletes.
Next Document:  Evidence for restricted muscle blood flow during speed skating.