The purpose of this study was to investigate how the effect of photocatalysis-plated garment influenced the sweat malodor caused by exercise in the heat. Eight healthy male subjects performed two exercise and heat stress trials who wore T-shirts coated by titanium dioxide and apatite (TDA), or wore normal T-shirts (CON). Each trial was consisted of the 20 min. running at 60%HRmax, and the 30min. seated rest. Testing was done in a room maintained at 30℃ and 70% relative humidity. Before and after the trial, the odor of T-shirts was analyzed by an electronic nose. The odor index (indicating odor quantity) in the TDA did not change after the trial, but that in the CON increased (p<0.01). The intensity of smell representation (indicating odor quality) for hydrogen sulfide and organic acid system in the CON increased after the trial, but there was no change in the TDA (p<0.05 and p<0.01, respectively). These results shows that the titanium dioxide and apatite coating inhibit the malodor from the T-shirts caused by exercise in the heat.

DESCENTE SPORTS SCIENCE Vol.29/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE