Document Detail


Cutaneous vascular response to exercise and acute hypoxia.
MedLine Citation:
PMID:  7153126     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Six normal young men were studied during 50 min of moderate exercise (100-137 W) that included one 15-min (protocol 1) or two 10-min periods of breathing 11-12% O2 (in N2) (protocol 2). Absolute work intensity was kept constant for each subject, but relative severity increased during hypoxia owing to reduction in maximum O2 uptake. Our question was whether hypoxia causes cutaneous vasoconstriction; this in turn should cause a rise in esophageal temperature (Tes) and a shift in the forearm skin blood flow (SkBF)-Tes relationship. In all subjects forearm blood flow (FBF) (venous occlusion plethysmography) rose throughout exercise and Tes tended to stabilize. Neither 10- nor 15-min periods of hypoxia caused systematic changes in FBF or Tes or their relationship to each other. We conclude that hypoxia equivalent to that incurred at 4,500-5,000 m does not significantly alter the short-term regulation of SkBF and body temperature during moderate exercise. Net cutaneous vasoconstriction is not elicited by arterial chemoreflexes under these conditions.
Authors:
L B Rowell; P R Freund; G L Brengelmann
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of applied physiology: respiratory, environmental and exercise physiology     Volume:  53     ISSN:  0161-7567     ISO Abbreviation:  J Appl Physiol Respir Environ Exerc Physiol     Publication Date:  1982 Oct 
Date Detail:
Created Date:  1983-03-11     Completed Date:  1983-03-11     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  7801242     Medline TA:  J Appl Physiol Respir Environ Exerc Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  920-4     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Anoxia / physiopathology*
Body Temperature Regulation
Humans
Male
Physical Exertion*
Regional Blood Flow
Skin / blood supply*
Vasoconstriction
Vasomotor System / physiology
Grant Support
ID/Acronym/Agency:
HL-16910/HL/NHLBI NIH HHS; RR-37/RR/NCRR NIH HHS

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


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