Thermoregulation during rest and exercise in the cold in pre- and early pubescent boys and in young men.
Thermoregulation during rest and exercise in the cold in pre- and early pubescent boys and in young men.
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青春期前和青春期早期男孩和年轻男性在寒冷中休息和运动时的体温调节。
DOI：
10.1152/jappl.1992.72.4.1589
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发表时间：
1992
影响因子：
3.3
通讯作者：
J. Ilmarinen
中科院分区：
文献类型：
--
作者：
J. Smolander;O. Bar;O. Korhonen;J. Ilmarinen
8 名衣着朴素的青春期前和青春期早期男孩（11-12 岁）和 11 名年轻成年男性（19-34 岁）休息 20 分钟，并在 5 摄氏度下以最大耗氧量 (VO2max) 的 30% 左右在自行车测力计上锻炼 40 分钟。为了量化因寒冷而导致的代谢率增加，在 21 摄氏度休息和同等工作条件下进行了一项单独的测试率如在寒冷中。两组的皮下脂肪厚度和每公斤体重的最大摄氧量相似。在暴露于寒冷的过程中，直肠温度略有升高，但男孩和男性之间没有观察到显着差异。在寒冷的环境下，男孩四肢的皮肤温度比成年人低，但躯干的皮肤温度却不然。男孩们在寒冷中的新陈代谢率比男性增加得更多。结果，男孩们和成年人一样有效地保持了核心体温。当比较两个男孩和两个体型相同的男性时，观察到了与年龄相关的对寒冷的体温调节反应的类似差异。我们的研究结果表明，儿童和成人在寒冷时的体温调节可能存在与成熟相关的差异。
Eight minimally dressed pre- and early pubescent boys (age 11-12 yr) and 11 young adult men (age 19-34 yr) rested for 20 min and exercised on a cycle ergometer for 40 min at approximately 30% of their maximum oxygen consumption (VO2max) at 5 degrees C. To quantify the added increase in metabolic rate because of cold, a separate test was carried out at 21 degrees C at rest and at equal work rates as in the cold. Both groups were similar in subcutaneous fat thickness and VO2max per kilogram body weight. Rectal temperature increased slightly during the exposure to the cold, but no significant difference was observed between the boys and men. In the cold, the boys had lower skin temperatures than the adults in their extremities but not in the trunk. The boys increased their metabolic rates in the cold more than did the men. As a result, the boys maintained their core temperature as effectively as the adults. Similar age-related differences in thermoregulatory responses to cold were observed when two boys and two men with equal body sizes were compared. Our results suggest that there may be maturation-related differences in thermoregulation in the cold between children and adults.