A STUDY ON EXPOSURE TO ULTRAVIOLET RAYS DURING OUTDOOR-SPORTS ACTIVITY

1. Intensities of ultraviolet rays (UV) from every direction and the a mount of W absorbed by each body part was measured in four situations (track, beach, golf course and skiing slope). 2. The intensity of UV w as measured by a portable W meter and the amount of UV absorbed by eve ry body part was measured with a UV irradiation energy measurement lab el. 3. The intensity of UV was strong from S45 degrees and SE45 degree s in all cases. On snow, the intensity of UV from every direction was stronger than in other situations, it was especially strong in reflect ion from below and from the north. The W reflection from the sand was slightly larger than that from mud and grass. 4. The experimental day' s weather was fine and occasionally cloudy during golf, beach activity and gate-ball, and clear during skiing. 5. The UV deal of a horizonta l plane was 135, 98, 156 and 120 kJ/m(2)/h at golf, beach activity, ga te-ball and skiing, respectively. 6. This study suggests that players should be concerned with the prevention of UV radiation during sportin g activity.