Ethic and sex differences in human thermal comfort sensation in Japanese and Caucasian. Relevance of thermal comfort limit of the whole body to heat production-

本研究通过一系列主观实验来探讨热舒适感的伦理和性别差异。健康的日本青年男女学生和高加索男学生自愿参加了实验，受试者在速度为4.5公里/小时的跑步机上锻炼，全身热舒适极限为0。21±0。03(-)在日本女性中，0。39±0。日本男性为05(-)，0。34±0。03(-)在高加索男性中。日本男性的热舒适极限在统计上与高加索男性相同。另一方面，日本男性的热舒适极限明显大于日本女性。这些结果表明，热舒适极限并不因伦理而异，但它因性别而异。此外，所获得的数据显示，Gagge的预测方程高估了女性受试者的热舒适极限，尽管它有效地估计了男性受试者的热舒适极限。因此，本研究推导了利用产热量预测女性热舒适极限的公式。

This study has been made to discuss ethic and sex differences in thermal comfort sensation through a series of subjective experiments. Healthy young Japanese female and male students, and Caucasian male students participated voluntary in the experiment, in which the subjects exercised on a treadmill with a speed of 4. 5 km/h. The thermal comfort limits of the whole body were 0. 21±0. 03(-) in the Japanese females, 0. 39±0. 05(-) in the Japanese males, and 0. 34±0. 03(-) in the Caucasian males. The thermal comfort limit in the Japanese males was found to be statistically equal to that in the Caucasian males. On the other hand, the thermal comfort limit was significantly larger in the Japanese males than in the Japanese females. Those obtained results indicated that the thermal comfort limit did not differ depending upon the ethic, while it differed depending upon the sex. In addition, the obtained data revealed that the Gagge's prediction equation overestimated the thermal comfort limit in the female subjects, although it estimated validly the one in the male subjects. Therefore, the present study derived an equation to predict the thermal comfort limit for females using the heat production.