The experiments were executed to know whether hand-grip exercise performance is influenced by different kinds of clothing (polyester or wool garments) at a constant ambient temperature of 32°C and cyclical changes of environmental humidity between 50% and 70%. Main results are summarized as follows : 1) The mean numbers of contractions during the hand-grip exercise were 1336.8±1242.0 (Mean±S. E. M.) in wool garments and were 1114.8±223.7 in polyester garments. 2) There were not any consistent differences in rectal temperature between two kinds of garments. Our preliminary results indicate that the different moisture regain between wool and polyester might have some significant meaning on the relation between clothing and hand-grip exercise efficiency.

DESCENTE SPORTS SCIENCE Vol.11/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE