Physiological Responses of Obese and Lean Women During Immersion of Their Legs in a Hot Water Bath
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概要
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Ten obese and ten lean female university students were exposed to a hot environment in summer. Experiments were carried out at around 15: 00 h. The subjects were instructed to fast and rest at least two hours before the experiment. The women whose body fat content was more than 19% were defined as obese subjects and those whose boby fat content was less than 15% were defined as lean subjects. After having been in a room of 30°C with 70% R. H. for 60min, subjects, during follicular phase of menstrual cycle, clad in swimming suits, immersed theis legs up to the knees into a water bath of 42°C for 60min. The obese subjects showed lower skin temperature, higher oral temperature, lower metabolic rate per body weight and lower conductive convective heat transfer coefficient from core to shell than the lean subjects before immersion of legs in the hot water. The obese subjects showed less rise in oral temperature, lower local sweat rate, less body weight loss per body weight and less metabolic rate per body weight in a hot bath. A higher oral temperature in spite of lower metabolic rate per body weight for obese subjects at 30°C before immersion of their legs into a hot bath could reflect their lower skin temperature caused by thicker subcutaneous fat layer. The evidence of less rise in oral temperature and less weight loss per body weight in obese subjects in a hot bath may be explained by less heat load per body weight due to smaller skin surface of legs per body weight and thicker subcutaneous fat layer of calves.
- 日本生気象学会の論文
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