Toner M M, Sawka M N, Foley M E, Pandolf K B
J Appl Physiol (1985). 1986 Feb;60(2):521-5. doi: 10.1152/jappl.1986.60.2.521.
Ten male volunteers were divided into two groups based on body morphology and mass. The large-body mass (LM) group (n = 5) was 16.3 kg heavier and 0.22 cm2 X kg-1 X 10(-2) smaller in surface area-to-mass ratio (AD X wt-1) (P less than 0.05) than the small-body mass (SM) group (n = 5). Both groups were similar in total body fat and skinfold thicknesses (P greater than 0.05). All individuals were immersed for 1 h in stirred water at 26 degrees C during both rest and one intensity of exercise (metabolic rate approximately 550 W). During resting exposures metabolic rate (M) and rectal temperature (Tre) were not different (P greater than 0.05) between the LM and SM groups at min 60. Esophageal temperature (Tes) was higher (P less than 0.05) for the SM group at min 60, although the change in Tes during the 60 min between groups was similar (LM, -0.4 degrees C; SM, -0.2 degrees C). Tissue insulation (I) was lower (P less than 0.05) for SM (0.061 degrees C X m-2 X W-1) compared with the LM group (0.098 degrees C X m-2 X W-1). During exercise M, Tre, Tes, and I were not different (P greater than 0.05) between groups at min 60. These data illustrate that a greater body mass between individuals increases the overall tissue insulation during rest, most likely as a result of a greater volume of muscle tissue to provide insulation.(ABSTRACT TRUNCATED AT 250 WORDS)
十名男性志愿者根据身体形态和体重被分为两组。大体质量（LM）组（n = 5）比小体质量（SM）组（n = 5）重16.3千克，且体表面积与质量比（AD×wt-1）小0.22平方厘米·千克-1×10（-2）（P < 0.05）。两组的总体脂肪和皮褶厚度相似（P > 0.05）。所有个体在休息和一种运动强度（代谢率约550瓦）期间均于26摄氏度的搅拌水中浸泡1小时。在休息暴露期间，60分钟时LM组和SM组之间的代谢率（M）和直肠温度（Tre）无差异（P > 0.05）。60分钟时SM组的食管温度（Tes）较高（P < 0.05），尽管两组之间60分钟内Tes的变化相似（LM组，-0.4摄氏度；SM组，-0.2摄氏度）。与LM组（0.098摄氏度·米-2·瓦-1）相比，SM组的组织隔热（I）较低（P < 0.05）（0.061摄氏度·米-2·瓦-1）。在运动期间，60分钟时两组之间的M、Tre、Tes和I无差异（P > 0.05）。这些数据表明，个体间更大的体重在休息期间增加了整体组织隔热，很可能是由于更多的肌肉组织量提供了隔热。（摘要截断于250字）
