Importance of Heat Acclimation in the Prevention of Heat Illness during Sports Activity and Work

概要

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The incidence of heat illness during sports activity and work is linked to whether people have acclimated to a hot environment. Heat acclimation improves endurance exercise performance in the heat and thermal comfort at a given exercise rate. These improvements are achieved by increased sweating and skin blood flow responses, better fluid balance and cardiovascular stability. As a practical means of acclimatizing the body to heat stress, daily aerobic exercise training is recommended since thermoregulatory capacity and blood volume increase with physical fitness. In people wearing personal protective suits in hot environments, however, little psychophysiological benefit is received from exercise training and/or heat acclimation because of the ineffectiveness of sweating for heat dissipation and aggravation of thermal discomfort with accumulating sweat within the suit. For physical exercise under uncompensable heat stress, better management of the exercise rate, the environment and health is required.
2012-11-00