Abstract
The effects of the materials and the yarn structures for active sportswear on thermoregulatory responses were compared among the four samples (polyester / cotton=100 / 0% or 50 / 50%). The subjects wearing T-shirt and short-pants ran on a treadmill with 60%Vo_2max for 30min with a wind (3m / sec) at 32℃, 70%RH. The rise of body temperature during the exercise was lowest in the T-shirt of E_1 fabric, made of polyester yarn which composed of a heavy-denier filament covered about 80% by fine filaments, which we have previously estimated the most desirable using a simulation method. The skin temperature, the clothing microclimate temperature and the humaidity of clothing microclimate were also lowest in E_1 T-shirt. The subjects also confirmed that E_1 T-shirt was the most comfortable. It was concluded that the material and yarn structure affects human thermoregulation.
