운동에 의한 열 스트레스하에서 흡한속건성 소재 운동복 착용시의 온열생리적 반응 및 주관적 감각
Thermophysiological Responses and Subjective Sensations when Wearing Clothing with Quickly Water-Absorbent and Dry Properties Under Exercise-Induced Heat Strain
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Abstract
clothing materials with different water transfer property investigated in exercising and resting subjects at an ambient tem-perature of 20oC and a relative humidity of 40%. Two kinds of clothing ensemble were tested: 100% cotton with highlywater-absorbent but slowly dry properties(C) and 100% polyester with quickly water-absorbent and dry properties by fourcapillary channels(QADP). Seven apparently healthy male participants each undertook two series of experiments com-prised 10-min of rest, 20-min of exercise with 70% of VO2max on a treadmill and 20-min of recovery. Mean skin tem-perature was significantly lower in QADP than in C during exercise and recovery. Clothing microclimate temperature wassignificantly lower in QADP during exercise and clothing surface temperature was also lower in QADP especially duringcentration of blood lactic acid tended to decrease to a lower level at recovery 3 minutes when wearing QADP rather thanC clothing ensemble. Metabolic energy was marginally significantly less during the second half of exercise in QADP. Bodymass loss tended to be greater in C than in QADP. The participants had better scores in thermal sensation, comfortablesensation and wetness in QADP during exercise and recovery. These results show that functional materials with quicklywater-absorbent and dry properties can alleviate heat strain and induce more comfortable clothing microclimates and sub-jective sensations in the exercise-induced hyperthermia.
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