PMID: 7085415Apr 1, 1982Paper

Acclimatization to dry heat: active men vs. active women

Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
D H Horstman, E Christensen

Abstract

Physiological responses to exercise in dry heat were compared between six active men [maximum O2 consumption (VO2max), 51.4 +/- 1.2 ml . kg-1 . min-1] and four active women (VO2max, 47.2 +/- 1.3 ml . kg-1 . min-1) before, during, and after heat acclimatization. Subjects cycled a maximum of 2 h at 40% VO2max at 45 degrees C dry-bulb temperature, 23 degrees C wet-bulb temperature for 11 days. Prior to acclimatization there were no sexual differences for performance time, rate of increase of rectal temperature (delta Tre), or sweat rate per degree C increase of rectal temperature (msw/delta Tre). Sweat rate (msw) was greater for the men than for the women. Although there was no difference in the rate of increase of heart rate (delta HR), HR for the women was maintained 15-20 beats . min-1 higher than for the men. Acclimatization occurred for both sexes as indicated by reduced Tre and HR and increased msw and performance time. With acclimatization the women had longer performance times than the men. Even though the men still had greater msw, delta Tre was also greater; therefore msw/delta Tre for the men was less than for the women. Neither HR nor delta HR was different between the sexes. Throughout, resting hematocrit for the wome...Continue Reading

Citations

Sep 19, 2006·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·A M C GarciaE Silami-Garcia
Oct 19, 2011·The Journal of Physiology·Daniel Gagnon, Glen P Kenny
Mar 8, 2019·Frontiers in Physiology·Sharifah Badriyah AlhadadJason K W Lee
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Related Concepts

Acclimatization
Serum Proteins
Cardiac Output
Pulse Rate
Hematocrit Procedure
Oxygen Consumption
Sweating

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