REFERENCE TO MODERATELY FAT SUBJECTS. I

The present investigation has studied thermoregulation In a group of mod-erately fat (18-22 % body fat) college-age men during water immersion, and the interrelationships between temperature (cold stress), work intensity (metabolic stress), and body composition ( % body fat). The metabolic, thermal, and car-diovascular adjustments were determined at rest and during graded submaximal exercise in air and during water immersion at 18, 26, and 33C. Based on the present observations, the following conclusions are warranted: Fat subjects demonstrated slightly higher VO2 and HR values in 33 C water than in air. How-ever, in cool (26 C) or cold (18 C) water, fat subjects did not demonstrate any significant change in VO2 or HR during rest or submaximum exercise. There were no significant effects of water immersion or temperature on relation to VO2 at rest or during submaximum work. Thus, at a particular water temper-ature, the VE was dependent on V02 during cool and cold water exposure, and did not reflect a basic alteration in the VE- V02 relationship. Rectal temperatur