The Critical Temperature in Naked Man

Summary. Investigations have begun made on the critical temperature in naked man and the metabolic cost of maintaining an adequate heat balance below this point. The experiments were performed on a bicycle ergo meter in a cold room, by letting the subjects do just enough work to avoid becoming cold. The critical temperature was found to be approximately 26“ C, confirming earlier studies, and below this point the heat production increased approximately in proportion to the body‐to‐air temperature gradient, conforming with Newton's law of cooling and with data from most other mammals and birds.