Environmental Ergonomics Laboratory, Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka, Japan.
Eur J Appl Physiol. 2011 Oct;111(10):2581-91. doi: 10.1007/s00421-011-1882-7. Epub 2011 Mar 4.
The purpose of this study was to investigate the validity of a newly developed method for quantifying perceived skin wettedness (W (p)) as an index to evaluate heat strain. Eight male subjects underwent 12 experimental conditions: activities (rest and exercise) × clothing (Control, Tyvek and Vinyl condition) × air temperatures (25 and 32°C). To quantify the W (p), a full body map with 21 demarcated regions was presented to the subject. The results showed that (1) at rest in 25°C, W (p) finally reached 4.4, 8.3 and 51.6% of the whole body surface area for Control, Tyvek, and Vinyl conditions, respectively, while W (p) at rest in 32°C rose to 35.8, 61.4 and 89.8%; (2) W (p) has a distinguishable power to detect the most wetted and the first wetted regions. The most wetted body regions were the upper back, followed by the chest, front neck, and forehead. The first perceived regions in the skin wetted map were the chest, forehead, and upper back; (3) W (p) at rest showed a significant relationship with the calculated skin wettedness (w) (r = 0.645, p < 0.01) and (4) W (p) had a significant relationship with core temperature, skin temperature, heart rate, total sweat rate, thermal comfort, and humidity sensation (p < 0.05), but these relationships were dependent on the level of activities and clothing insulation. W (p) in hot environments was more valid as a heat strain index of workers wearing normal clothing in light works, rather than wearing impermeable protective clothing in strenuous works.
本研究旨在探讨一种新开发的量化感知皮肤湿润度（W（p））的方法的有效性，将其作为评估热应激的指标。8 名男性受试者接受了 12 种实验条件：活动（休息和运动）×衣着（控制、特卫强和乙烯基条件）×空气温度（25 和 32°C）。为了量化 W（p），向受试者呈现了一个包含 21 个划定区域的全身图谱。结果表明：（1）在 25°C 下休息时，W（p）最终分别达到控制、特卫强和乙烯基条件下整个身体表面积的 4.4%、8.3%和 51.6%，而在 32°C 下休息时 W（p）上升至 35.8%、61.4%和 89.8%；（2）W（p）具有区分最湿和最先湿区域的能力。最湿的身体区域是上背部，其次是胸部、前颈部和额头。皮肤湿润图中最先感知的区域是胸部、额头和上背部；（3）休息时的 W（p）与计算出的皮肤湿润度（w）呈显著相关（r=0.645，p<0.01）；（4）W（p）与核心温度、皮肤温度、心率、总出汗率、热舒适感和湿度感呈显著相关（p<0.05），但这些关系取决于活动水平和衣着隔热性能。在炎热环境中，W（p）作为穿着普通衣物进行轻度工作的工人的热应激指标更为有效，而不是穿着不透气的防护服进行剧烈工作。
