EFFECTS OF FITNESS, FATNESS, AND AGE ON MENS RESPONSES TO WHOLE-BODY COOLING IN AIR
EFFECTS OF FITNESS, FATNESS, AND AGE ON MENS RESPONSES TO WHOLE-BODY COOLING IN AIR
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DOI：
10.1152/jappl.1991.71.6.2387
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发表时间：
1991-12-01
影响因子：
3.3
通讯作者：
JEFFERY, SE
中科院分区：
文献类型：
--
作者：
BUDD, GM;BROTHERHOOD, JR;JEFFERY, SE
简单和多元回归分析被用来评估12个白色男子的健身（有氧能力44-58毫升O2。min-1。kg无脂质量-1）、肥胖（平均皮褶厚度5-20 mm，体脂含量15-36%）和年龄（26-52岁）对2小时全身降温的热反应、代谢反应、心血管反应和主观反应的影响，裸体，在10摄氏度的空气中。 健康的男性心率较慢，肥胖的男性血压较高。 健身对任何测量的对寒冷的反应都没有影响（P > 0.39）。 肥胖与减少的热量损失、产热和平均皮肤温度有关（P < 0.01）;热债不变;组织绝缘增加。 年龄有相反的影响。 当肥胖的混杂效应通过多元回归保持不变时，老年男性对寒冷的反应就好像他们每3-4岁瘦1毫米的皮褶厚度。 我们的结论是，老化，即使是相对年轻的年龄之间的26和52岁，是伴随着一个渐进的削弱血管收缩反应冷。
Simple and multiple regression analyses were used to assess the influence of 12 white men's fitness (aerobic capacity 44-58 ml O2 . min-1 . kg fat-free mass-1), fatness (mean skin-fold thickness 5-20 mm, body fat content 15-36%), and age (26-52 yr) on their thermal, metabolic, cardiovascular, and subjective responses to 2 h of whole body cooling, nude, in air at 10-degrees-C. Fitter men had slower heart rates, and fatter men had higher blood pressures. Fitness had no effect (P > 0.39) on any measured response to cold. Fatness was associated (P < 0.01) with reduced heat loss, heat production, and mean skin temperature; unchanged heat debt; and increased tissue insulation. Age had the opposite effects. When the confounding effects of fatness were held constant by multiple regression, older men responded to cold as though they were 1 mm of skinfold thickness leaner for each 3-4 yr of age. We conclude that aging, even between the relatively youthful ages of 26 and 52 yr, is accompanied by a progressive weakening of the vasoconstrictor response to cold.