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一些作者认为热带人的身材小是对热的一种形态上的适应。热带人的体表面积与体重(SA/W)的比率比温带人高,因此他们产生的代谢热量相对地低,与周围空气的热交换相对地大,所以在普通的热环境下,SA/W比率高的人要比SA/W比率低的人有利。但有的报告提出不同种族、SA/W比率不同的人对热反应差别很少。
Some authors believe that the tropical person’s small size is a morphological adaptation to heat. The ratio of body surface area to body weight (SA / W) of tropical people is higher than that of temperate zone, so they produce relatively low metabolic heat and relatively large heat exchange with the surrounding air, so that under normal thermal environment, SA / W People who have a high ratio are better off than those who have a low SA / W ratio. However, some reports suggest that people of different races and people with different SA / W ratios have very little difference in response to heat.