PMID: 11929063Apr 4, 2002Paper

Anthropological and thermoregulatory changes induced by a survival sojourn in a tropical climate

Wilderness & Environmental Medicine
Jean-Claude LaunayG Savourey

Abstract

A survival sojourn in a tropical climate exposes subjects to 2 main constraints: food restriction and tropical climatic conditions. We hypothesized that such a sojourn could modify anthropological characteristics and thermoregulatory responses to heat and cold on return. Eight European male subjects were submitted to a sweating test (ST) for 90 minutes (dry bulb temperature [Tdb] = 47 degrees C, relative humidity (RH) = 10%, and wind speed = 0.8 m x s(-1)) and to a whole-body cold-air test (Tdb = 1 degrees C, RH = 40%, and wind speed = 0.8 m x s(-1)) for 120 minutes in thermoclimatic chambers both before and after a 4-week survival sojourn in French Guyana. The survival sojourn resulted in a decrease in lean body mass (P < .05) without any significant change in body fat content. Heat thermoregulatory changes studied during the ST were characterized both by a lower mean skin temperature (Tsk) (P < .05) and a higher sweat rate measured after the sojourn than before it (m(sw); P < .05). Cold thermoregulatory changes were characterized by a higher T(sk) value (P < .05) and a decreased onset for continuous shivering without any significant change in internal temperature or metabolic heat production (M). This study showed that this t...Continue Reading

Citations

May 22, 2007·Archives of Gynecology and Obstetrics·Miranda FarageHoward Maibach
Jun 18, 2009·Industrial Health·Jean-Claude Launay, Gustave Savourey
Jan 6, 2007·European Journal of Obstetrics, Gynecology, and Reproductive Biology·Miranda FarageJack Sobel

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