Thermal Responses of Men With High Initial Temperatures to the Stress of Heat and Work

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Abstract
37 Africans with mild illnesses and rectal temps. above 100[degree]F were studied in the stress of work and heat. Generally, they had a more rapid and greater rise in temps. than healthy men. In moderate and severe heat stress, most men reached temps. of 104[degree]F. Such men were distressed. In a population of 380 raw recruits, the initial rectal temps. after 1 hr. of rest were 99.4 [plus or minus] 0.6[degree]F in cool conditions in the surface of the gold mine; the temps. on the next day in a mildly warm ante-room, after 1 hr. rest, were 99.7 [plus or minus] 0.5[degree]F. The latter is compared with 98.5 [plus or minus] 0.5[degree]F of acclimatized men in the same circumstances. Under conditions of mild and moderate heat stress there was a significant correlation between the initial level of rectal temp. of the 380 men and the highest achieved doing work in heat. Hence, it may be possible to predict which men in a group required to work in heat will develop undesirable body temps.

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