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Biophysical principles of acclimatization to heat.
Physiological adaptations, desert and mountains. Bullard RW, Horvath SM, Yousef MK, eds. New York: Academic Press, 1972 Jan; :9-21
Quickening of the sweating mechanism is cited as the major factor in acclimatization to heat. In dry heat, the mechanism permits lower skin and core temperatures with small change in rate of sweating. In wet heat, the quickening results in a markedly increased sweat production, which effectively assures a larger wetted area of skin and greater evaporative cooling. Little evidence is found that an increase in dermal conductance plays an important part in acclimatization to heat. The decrease in circulatory strain in dry heat after acclimatization can be attributed in large part to the lower skin temperature. In wet heat, the decrease seems to result primarily from the better balancing of the circulation against competing demands of muscle, vital organs, and skin.
NIOSH-Grant; Thermal-stress; Adaptation; Circulatory-system; Thermal-tolerance; Heat-transfer; Fatigue; Physiological-responses; Heat-regulation; Biophysics; Skin-temperature
Occupational Health Univ of Pittsburgh Sch of PH 130 DE Soto Street Pittsburgh, PA 15213
Bullard-RW; Horvath-SM; Yousef-MK
Physiological adaptations, desert and mountains
University of Pittsburgh, Pittsburgh, Pennsylvania
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division