Document Detail


Does sex have an independent effect on thermoeffector responses during exercise in the heat?
MedLine Citation:
PMID:  23045336     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Although a number of studies have examined potential differences in temperature regulation between males and females during heat stress, conclusions have remained limited as to whether reported differences are due to confounding physical characteristics or to actual differences in the physiological variables of temperature regulation. Recent observations suggest that sex differences in temperature regulation, particularly in sudomotor activity, go beyond those associated with physical characteristics. Females have recently been shown to have a lower sudomotor activity, as well as a lower thermosensitivity of the response compared to males during exercise performed at a fixed rate of metabolic heat production. Furthermore, sex differences in local and whole-body sudomotor activity are only evident above a certain combination of environmental conditions and rate of metabolic heat production. In contrast, both the onset threshold and thermosensitivity of cutaneous vasodilatation are similar between males and females. In theory, differences in the thermosensitivity of sudomotor activity could be related to either a central (neural activity/integration) and/or peripheral (effector organ) modulation of temperature regulation. Based on recent findings, sex differences in sudomotor activity appear to be mediated peripherally, although a central modulation has yet to be conclusively ruled out. Here we present a brief yet comprehensive review of the current state of knowledge pertaining to sex differences in temperature regulation during exercise in the heat.
Authors:
Daniel Gagnon; Glen P Kenny
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review     Date:  2012-10-08
Journal Detail:
Title:  The Journal of physiology     Volume:  590     ISSN:  1469-7793     ISO Abbreviation:  J. Physiol. (Lond.)     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-03     Completed Date:  2013-05-17     Revised Date:  2013-12-04    
Medline Journal Info:
Nlm Unique ID:  0266262     Medline TA:  J Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  5963-73     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Body Temperature Regulation / physiology*
Exercise / physiology*
Hot Temperature*
Humans
Sex Characteristics
Comments/Corrections

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


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