Shoji Igawa

A study on exposure to ultraviolet rays during outdoor sports activity

Abstract 1. 1. Intensities of ultraviolet rays (UV) from every direction and the amount of UV absorbed by each body part was measured in four situations (track, beach, golf course and skiing slope). 2. 2. The intensity of UV was measured by a portable UV meter and the amount of UV absorbed by every body part was measured with a UV irradiation energy measurement label. 3. 3. The intensity of UV was strong from S45° and SE45° in all cases. On snow, the intensity of UV from every direction was stronger than in other situations, it was especially strong in reflection from below and from the north. The UV reflection from the sand was slightly larger than that from mud and grass. 4. 4. The experimental days weather was fine and occasionally cloudy during golf, beach activity and gate-ball, and clear during skiing. 5. 5. The UV deal of a horizontal plane was 135, 98, 156 and 120 kJ/m 2 /h at golf, beach activity, gate-ball and skiing, respectively. 6. 6. This study suggests that players should be concerned with the prevention of UV radiation during sporting activity.