Lowering of resting core temperature during acclimation is influenced by exercise stimulus

European Journal of Applied Physiology
Bernhard KampmannBarbara Griefahn

Abstract

The decrease in resting core temperature (T (co)) and its relation to the reduced physiological strain during heat acclimation was analysed with rectal temperature data measured in three groups of eight semi-nude persons (6 males, 2 females) who were acclimated for 15 consecutive days to dry, humid and radiant heat, respectively, with equivalent WBGT (33.5 degrees C), by performing 2-h treadmill work. A fourth group followed the same protocol for 12 days in a neutral climate. After acclimation, both resting T (co), prior to heat exposure, and final T (co), measured at the end of work, were significantly reduced. The reduction in final T (co) increased with decreasing ambient water vapour pressure and was higher for the data pooled over the heat conditions (0.46 +/- 0.31 degrees C) than in the neutral climate (0.21 +/- 0.25 degrees C), whereas resting T (co) declined similarly in the heat (0.20 +/- 0.25 degrees C) and the neutral environment (0.17 +/- 0.23 degrees C). The lowering of resting and final T (co) after heat acclimation showed a significant correlation (r = 0.67) and regression analysis showed that 37% of the average reduction in final T (co) was attributable to the lowering of resting T (co). The same analysis was ap...Continue Reading

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Citations

Sep 4, 2009·European Journal of Applied Physiology·Andrew T GarrettJames D Cotter
Mar 12, 2010·European Journal of Applied Physiology·Marius Brazaitis, Albertas Skurvydas
Sep 15, 2011·European Journal of Applied Physiology·Andrew T GarrettJames D Cotter
Jun 1, 2011·International Journal of Biometeorology·Peter BrödeGeorge Havenith
Nov 8, 2013·Journal of Occupational and Environmental Hygiene·Heather E WrightGlen P Kenny
Jun 10, 2011·Journal of Strength and Conditioning Research·David P FergusonJ Timothy Lightfoot
Aug 19, 2011·Sports Medicine·Andrew T GarrettMark J Patterson
Mar 19, 2014·International Journal of Biometeorology·C R de Freitas, E A Grigorieva
Dec 10, 2015·Prehospital and Disaster Medicine·Matt B Brearley
Dec 26, 2015·International Journal of Environmental Research and Public Health·Christopher R de Freitas, Elena A Grigorieva
Feb 9, 2018·International Journal of Biometeorology·Robert E Davis, Kyle B Enfield
May 30, 2014·Medicine and Science in Sports and Exercise·Martin P PoirierGlen P Kenny
Feb 16, 2020·International Journal of Biometeorology·Elena A Grigorieva
Nov 30, 2020·Military Medical Research·Edward Tom AshworthAndrew Edward Kilding

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