Variations in Basal Metabolic Rate at 1.85 km Altitude

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Abstract
The basal metabolic rates (BMR) of 12 experimental subjects (20-23 years of age) were determined by means of Hartmann-Braun apparatus at various periods during a sojourn of 12 days at 1.85 km altitude (Uludag). These values were compared with those obtained at sea level (Istanbul) prior to ascent and following the descent from mid-altitude. The BMR of each subject was expressed both as Cal/24 hours and Cal/m2/hour. Both values were definitely increased on the 5th to the 6th day of the sojourn at Uludag and remained at practically the same level during the remainder of the experimental period on the mountain. On return to sea level, the BMR was reduced to normal in all subjects within various periods of time following the descent from mid-altitude. The mean RQ value was diminished from an initial of 0.92 to 0.84-0.85 during the sojourn at mid-altitude. On return to sea level, RQ was again increased to normal. The respiratory minute volume also tended to be increased during the second experi-mental period at Uluda[image]. On further residence, it was somewhat diminished. The implications of these findings are discussed.

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