Abstract
The purposes of the present study were to observe the thermoregulatory responses from view points of sex difference, seasonal difference between winter and summer, and susceptibility to the heat (atugari) and the cold (samugari). The subjects were 13 females (20.5±0.5yrs, 159.2±6.4cm, 52.1±6.9kg) and 16 males (20.8±1.6yrs, 172.8±4.5cm, 61.6±6.3kg). They put on shorts or underpants, T-shirts and short pants. In the evening, the climatic chamber was controlled at 24℃ RH50%, the temperature increased to 29℃ over 60 minutes gradually. The subjects kept the sitting position. Measurement items were oral temperature, skin temperature, body weight, heart rate, blood pressure and subjective sensations. We determined atugari and samugari according to the subjective sensations of whole body during exposure. The main results were as follows. (1) The classification of atugari and samugari by self judgment did not always agree with the results of exposure experiments, (2) The skin temperatures were winter > summer in the body stem area and winter < summer in the peripheral area in male and female. (3) The skin temperatures were male < female in the body stem area and male > female in the limbs area. (4) Males felt warm in winter than in summer, and they felt warm than females in winter. (5) The values of subjective sensation were atugari > samugari generally. We guessed that the evening exposure produced these phenomena.
