Oxygen consumption and body temperatures of Eskimos during sleep

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Abstract
This paper reports the results of measurements of metabolism and body temperatures taken during 14 nights of comfortably warm sleep in six male Eskimos from the village of Wainwright on the arctic coast of Alaska. The mean age of these subjects was 20.8 ([plus or minus]1.26) years, mean height 169.1 ([plus or minus]5.08) cm, mean weight 66.6 ([plus or minus]2.0) kg and mean value for percent body fat 9.1 ([plus or minus]1.08)%. These data show the effects of the sleep cycle on metabolism and body temperature. The sleeping metabolic rate declined from 51 ([plus or minus]7.35) kcal/m2 per hr at 2230 hours to 39 ([plus or minus]5.22) kcal/m2 per hr at 0600 hours. Concomitantly, rectal temperature fell 1.6 C from 37.0 ([plus or minus].386) C at 2230 hours to 35.4 ([plus or minus].386) C by 0600 hours. The level of metabolic activity was directly related to the calculated mean body temperature. The BMR [basal metabolism rate] of 43-45 kcal/m2 per hr in these subjects is consistent with the findings of a majority of the investigators who have reported an elevated BMR for Eskimos.

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