Document Detail

Aerobic power as a factor in women's response to work in hot environments.
MedLine Citation:
PMID:  1002636     Owner:  NLM     Status:  MEDLINE    
Twelve young women, athletes (n = 6) and nonathletes (n = 6), walked on a treadmill at loads equivalent to approximately 30% Vo2 max for two 50-min periods in three environments: 1) 28 degrees C, 45% rh, 2) 35 degrees C, 65% rh, and 3) 48 degrees C, 10% rh. There were no differences between groups in rectal temperature, heart rate, evaporative heat loss, or mean skin temperature at 28 or 35 degrees C or during the first work period in the 48 degrees C environment. However, a significantly lower cardiac output (Q) and stroke volume (SV) observed for nonathletes by the 46th min of work at 48 degrees C may explain why no nonathletes were able to complete a 2nd h of work while four of six athletes successfully finished the period. It appears that in conditions of severe heat stress (48 degrees C) athletes were able to maintain a cardiac output sufficient to meet the metabolic requirements and the large increase in peripheral blood flow for a longer period of time than nonathletes.
B L Drinkwater; J E Denton; I C Kupprat; T S Talag; S M Horvath
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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     Volume:  41     ISSN:  0021-8987     ISO Abbreviation:  J Appl Physiol     Publication Date:  1976 Dec 
Date Detail:
Created Date:  1977-02-16     Completed Date:  1977-02-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0376576     Medline TA:  J Appl Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  815-21     Citation Subset:  IM; S    
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MeSH Terms
Blood Pressure
Body Temperature
Body Temperature Regulation*
Cardiac Output
Electrolytes / blood
Forearm / blood supply
Heart Rate
Hot Temperature*
Oxygen Consumption*
Physical Exertion*
Plasma Volume
Regional Blood Flow
Sex Factors
Reg. No./Substance:

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

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