To investigate the effects of wearing two different forms of sportswear on physiological responses and comfort sensation during exercise, six women were volunteered. One garment covered 94% of the whole body surface area except for the head (EB), the other covered 57% of the whole body (ES). The subjects repeated 5-min moderate exercise three times with 5-min rest period in the upright position at an ambient temperarture of 20°C and a relative humidity of 25% or 60%. Discomfort, thermal and humidity sensations increased with rising mean body temperature during exercise. These sensations are enhanced by exercise as a non-thermal factor through increased vasomotor and sudomotor responses.
　Extremity skin temperatures, mean skin temperature, mean body temperatue and microclimate humidity were significantly higher in EB than in ES sportswear. Therefore, discomfort, thermal and humidity sensation were significantly higher in EB than in ES.
　It is suggested that exercise per se is the factor of enhancement of discomfort wearing sportswear, and increasing covered area of the body enhances discomfort in the present experimental conditions.

DESCENTE SPORTS SCIENCE Vol.12/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE