Ha M, Tokura H, Gotoh J, Holmér I
Department of Environmental Health, Nara Women's University.
Appl Human Sci. 1998 Sep;17(5):173-9. doi: 10.2114/jpa.17.173.
The purpose of this study is to investigate the thermophysiological significance of hydrophilic and hydrophobic properties of underwear materials under the influences of profuse sweating produced during severe exercise in the cold. Two kinds of underwear were used: two layers of cotton underwear with two-piece long-sleeved shirt and full-trousers (C), and two layers of polypropylene underwear with two-piece long-sleeved shirt and full-trousers (P). In addition, the subject put on a two-piece ski suit of 100% polyester including 100% polyester padding. Eight adult females volunteered as subjects in this study. The test was performed in a climatic chamber at an ambient air temperature of 2 degrees C and an air velocity of 0.26 m.s-1. The subject exercised on a cycle ergometer at an intensity of 65% maximal oxygen uptake for 30 min and followed by 60 min recovery. The major findings are summarized as follows: 1) The fall of rectal temperature tended to be greater in P during the recovery. 2) The absolute humidity of innermost layer and middle layer was significantly higher in C than in P during the recovery, but the absolute humidity of middle layer and outermost layer was significantly higher in P than in C during the exercise. 3) Clothing microclimate temperature of innermost at back was significantly higher in C during the exercise and recovery. 4) Metabolic heat production for last 30 min during recovery was significantly higher in P. 5) The degree of skin wettedness sensation and sweating sensation for whole body was significantly higher in P during the exercise. It was concluded that the slower evaporation behavior by absorbing of underwear material in the clothing system has a beneficial influence on thermophysiological responses during severe exercise and its recovery in the cold, although the differences were very small.
本研究的目的是调查在寒冷环境中剧烈运动产生大量出汗的情况下，内衣材料亲水性和疏水性的热生理意义。使用了两种内衣：两层棉质内衣，包括两件式长袖衬衫和长裤（C），以及两层聚丙烯内衣，包括两件式长袖衬衫和长裤（P）。此外，受试者穿着一套100%聚酯的两件式滑雪服，其中含有100%聚酯填充物。八名成年女性自愿作为本研究的受试者。测试在气候舱中进行，环境空气温度为2摄氏度，风速为0.26米/秒。受试者在功率自行车上以最大摄氧量的65%的强度运动30分钟，随后恢复60分钟。主要研究结果总结如下：1）恢复过程中，P组直肠温度下降趋势更大。2）恢复过程中，C组最内层和中间层的绝对湿度显著高于P组，但运动过程中，P组中间层和最外层的绝对湿度显著高于C组。3）运动和恢复过程中，C组背部最内层的服装微气候温度显著更高。4）恢复过程中最后30分钟，P组的代谢产热显著更高。5）运动过程中，P组全身皮肤湿润感和出汗感的程度显著更高。得出的结论是，尽管差异非常小，但服装系统中内衣材料吸收导致的较慢蒸发行为对寒冷环境中剧烈运动及其恢复过程中的热生理反应具有有益影响。
