Journal ArticleDOI
Physiological responses of physically fit men and women to acclimation to humid heat
TLDR
It was concluded that aerobic capacity is an important factor to be considered when men and women are compared in the heat, and when fitness levels are similar, except for sweating, the previously reported sex-related differences in response to heat seem to disappear.Abstract:
: Four men and four women with comparable maximal aerobic capacities and equal surface areas and surface area to mass ratios underwent a three hour heat stress test before and after a 10 day acclimation to humid heat. Women were tested during both pre- and post-ovulation (pre-OV, post-OV). Prior to acclimation, pre-OV women exhibited the longest tolerance times and lowest rectal temperature (TRE) and heart rates (HR) throughout testing. Men secreted considerably more sweat per unit area than did women in either phase of the cycle, yet they demonstrated shorter tolerance times and higher body temperatures and HR. During post-OV, women reacted similarly to men, although their sweat rates and HR's were significantly lower. Following acclimation, the TRE and HR of the men and women were similar while the discrepancy between the sweat rates was magnified. It was concluded that aerobic capacity is an important factor to be considered when men and women are compared in the heat. When fitness levels are similar, except for sweating, the previously reported sex-related differences in response to heat seem to disappear.read more
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Journal ArticleDOI
Human circulatory and thermoregulatory adaptations with heat acclimation and exercise in a hot, dry environment.
TL;DR: It is concluded that the high core temperature per se, and not circulatory failure, is the critical factor for the exhaustion during exercise in heat stress.
Journal ArticleDOI
National Athletic Trainers' Association Position Statement: Exertional Heat Illnesses
Douglas J. Casa,Julie K. DeMartini,Michael F. Bergeron,Dave Csillan,E. Randy Eichner,Rebecca M. Lopez,Michael S. Ferrara,Kevin C. Miller,Francis G. O'Connor,Michael N. Sawka,Susan W. Yeargin +10 more
TL;DR: Recommendations to present best-practice recommendations for the prevention, recognition, and treatment of exertional heat illnesses (EHIs) and to describe the relevant physiology of thermoregulation.
Medicine & Science in sports & Exercise
Jeanette M. López Walle,Isabel Balaguer Solá,Isabel Castillo Fernádez,José Leandro Tristán Rodríguez +3 more
Journal ArticleDOI
The induction and decay of heat acclimatisation in trained athletes
TL;DR: In attempting to optimise heat acclimatisation, athletes should maintain fluid-electrolyte balance, exercise at intensities greater than 50% V̇O2max for 10 to 14 days, and avoid factors which are known to reduce heat tolerance.
Journal ArticleDOI
Thermoregulation and marathon running: biological and environmental influences.
TL;DR: The correlation between running speed and Tre, especially over the final stages of a marathon event, is often significant but fails to reliably explain more than a fraction of the variability in post-marathon Tre; the submaximal exercise intensities observed throughout 42km races suggest the need for other synergistic factors or circumstances in explaining this occurrence.