Abstract

Clothed men at rest were exposed to two conditioning “indoor” environments (“British”, coolmoist; “American”, warm dry) for 45 minutes, and then to a cold environment (36°F) at moderate and high relative humidity (50% and 85%). The following measurements were taken: Temperature—skin, rectum and clothing gradients; nude body weight change and metabolism; subjective data. An attempt was made to measure clothing humidity gradients. The results showed that warm conditioning kept the clothing and skin at a higher temperature for a matter of 1 1/2 hours or more during cold exposure. The physiological value of such conditioning may be less marked under field conditions. No physiological objective or subjective differences of practical importance were found between the effects of still air at 36°F at moderate or high humidity, except for the finding of a slightly warmer skin of the chest at the high humidity. These results agree fairly well with those of other workers for nude men.

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