Title Time course of physiological and psychological responses in humans during a 20-day severe- cold–acclimation programme /
Authors Brazaitis, Marius ; Eimantas, Nerijus ; Daniusevičiūtė, Laura ; Baranauskiene, Neringa ; Skrodenienė, Erika ; Skurvydas, Albertas
DOI 10.1371/journal.pone.0094698
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Is Part of PLoS One.. San Francisco : Public Library of Science. 2014, vol. 9, no. 4, p. 1-12.. ISSN 1932-6203
Keywords [eng] Cold temperature ; Acclimatization ; Stress, psychological ; Adaptation, physiological
Abstract [eng] The time course of physiological and psychological markers during cold acclimation (CA) was explored. The experiment included 17 controlled (i.e., until the rectal temperature reached 35.5°C or 170 min had elapsed; for the CA-17 session, the subjects (n = 14) were immersed in water for the same amount of time as that used in the CA-1 session) head-out water immersions at a temperature of 14°C over 20 days. The data obtained in this study suggest that the subjects exhibited a thermoregulatory shift from peripheral-to-central to solely central input thermoregulation, as well as from shivering to non-shivering thermogenesis throughout the CA. In the first six CA sessions, a hypothermic type of acclimation was found; further CA (CA-7 to CA-16) led to a transitional shift to a hypothermic-insulative type of acclimation. Interestingly, when the subjects were immersed in water for the same time as that used in the CA-1 session (CA-17), the CA led to a hypothermic type of acclimation. The presence of a metabolic type of thermogenesis was evident only under thermoneutral conditions. Cold-water immersion decreased the concentration of cold-stress markers, reduced the activity of the innate immune system, suppressed specific immunity to a lesser degree and yielded less discomfort and cold sensation. We found a negative correlation between body mass index and Δ metabolic heat production before and after CA.
Published San Francisco : Public Library of Science
Type Journal article
Language English
Publication date 2014
CC license CC license description