PMID: 1194150Oct 1, 1975Paper

Orthostatism and heat acclimation

Journal of Applied Physiology
E ShvartzH Kotze

Abstract

Three groups of subjects (6 subj in each group) underwent the following precedures: group A was given a 20-min head-up tilt at 21 degrees C followed by 4 h of exercise at 33.9 degrees C DB, 32.2 degrees C WB, and a repetition of tilting after exercise in heat; group B underwent the same procedure at 21 degrees C; group C was tilted at 21 degrees C, rested in heat for 4 h and was retilted in heat. The above procedures were repeated for 8 days, and on the last day groups B and C underwent the same treatment as group A. Group A showed the usual decreases in heart rate and rectal temperature and an increase in sweat rate on acclimation. This corresponded to marked improvements in heat-orthostatism. While five subjects in group A fainted during post-exposure tilting on the first exposure, none fainted on the last day. Resting in heat (group C) did not cause any acclimation to work in heat. This corresponded to poor heat-orthostatism after the work-heat procedure when five subjects fainted. Mild training at 21 degrees C (group B) resulted in minor improvements to work in heat as evident by some improvements in heart rate responses after the 1st and 2nd h of exposure. This corresponded to better heat-orthostatism and fewer men faintin...Continue Reading

Citations

Jun 10, 2006·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Thad E WilsonCraig G Crandall
Dec 6, 2018·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Craig G CrandallBlair D Johnson
Jan 11, 2020·Frontiers in Physiology·Iain T ParsonsDavid R Woods
Jun 19, 2002·Journal of Applied Physiology·Thad E WilsonCraig G Crandall
Jan 1, 1997·Experimental Aging Research·K B Pandolf
Jan 25, 2005·Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society·Jennifer L DavisonThad E Wilson
Mar 13, 2009·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·David A LowCraig G Crandall
May 3, 2014·Journal of Applied Physiology·Shigehiko OgohManabu Shibasaki
Jun 22, 2011·The Journal of Physiology·Michael D NelsonPhilip N Ainslie
Aug 1, 2014·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·J PearsonC G Crandall
Jun 25, 2014·European Journal of Applied Physiology·Andreas D FlourisGlen P Kenny
Jun 1, 2004·Journal of Applied Physiology·Thad E Wilson, Chester A Ray

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