EFFECTS OF THE MENSTRUAL-CYCLE ON DRESSING BEHAVIOR IN THE COLD

The purpose of the present study was to determine the effect of the me nstrual cycle on dressing behavior in cold exposure. Rectal and skin t emperatures, temperature sensation and metabolic rate were measured in seven women during the luteal (L) and the follicular (F) phases of th e menstrual cycle, as was their dressing behavior in these two phases. The subjects were instructed to dress so as to feel comfortable when the ambient temperature was decreased from 30 degrees C to 15 degrees C (07:00-09:00). Most subjects dressed more quickly and with thicker c lothing in the L phase. They felt cooler in the L phase during the las t 30 min of the temperature fall. Rectal and skin temperatures showed significant differences between L and F phases and metabolic rate was significantly higher in the L phase. The results can be interpreted in terms of the establishment of a higher set-point in core temperature during the L phase.