Human physiological and heat shock protein 72 adaptations during the initial phase of humid-heat acclimation

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Marshall, Helen C. and Campbell, Samantha A. and Roberts, Craig W. and Nimmo, Myra A. (2007) Human physiological and heat shock protein 72 adaptations during the initial phase of humid-heat acclimation. Journal of Thermal Biology, 32 (6). pp. 341-348. ISSN 0306-4565 (https://doi.org/10.1016/j.jtherbio.2007.04.003)

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Abstract

The timescale and integration of human whole body and cellular Hsp72 adaptations during the initial phase of human-heat acclimation were determined. Two exercise humid-heat exposures on consecutive days lowered exercise rectal temperature (P < 0.05) and heart rate (P < 0.01). Sweat rate was increased (P < 0.001) during exercise through an improved maintenance of sweating, and sweat Na+ reabsorption was enhanced (P < 0.05). These adaptations were accompanied by a reduced Hsp72 mRNA response with no change in protein level. Two prolonged, low-intensity exercise-heat bouts on consecutive days are sufficient to initiate physiological and Hsp72 mRNA adaptations, although Hsp72 protein adaptation may require a greater exercise intensity or longer acclimation period.

ORCID iDs

Marshall, Helen C., Campbell, Samantha A., Roberts, Craig W. ORCID logoORCID: https://orcid.org/0000-0002-0653-835X and Nimmo, Myra A.;
CORE (COnnecting REpositories)