Seasonal changes in metabolic and temperature responses to cold air in humans
Seasonal changes in metabolic and temperature responses to cold air in humans
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DOI：
10.1016/j.physbeh.2004.05.001
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发表时间：
2004-09-15
影响因子：
2.9
通讯作者：
Westerterp, KR
中科院分区：
文献类型：
--
作者：
van Ooijen, AMJ;Lichtenbelt, WDVM;Westerterp, KR
在温和的海洋性气候中，研究了夏季和冬季微冷对代谢和温度的反应。受试者为10名女性和10名男性，年龄19-36岁，BMI 17-32 kg/m（2）。在环境温度为22 ℃的气候室中连续测量代谢率（MR）和体温，持续1小时，随后在15 ℃下持续3小时。冷暴露期间的平均代谢反应，以kJ/min随时间的增加来衡量，冬季（11.5%）显著高于夏季（7.0%，P <0.05）。两个季节的温度反应相当。冬季的代谢反应与夏季的反应显著相关（r（2）=.47，P < .001）。冷暴露期间的总产热与两个季节的2温度反应呈负相关（夏季，r（2）=.39，P < .01;冬季r（2）=.32，P < .05）。总之，与夏季相比，冬季观察到的更高的代谢反应表明了冷适应。寒冷反应的幅度各不相同，但代谢和温度反应的相对贡献是特定的，并且在整个季节都是一致的，这可能对能量平衡和身体成分产生影响。(C)2004年爱思唯尔公司All rights reserved.
The metabolic and temperature response to mild cold were investigated in summer and winter in a moderate oceanic climate. Subjects were 10 women and 10 men, aged 19-36 years and BMI 17-32 kg/m(2). Metabolic rate (MR) and body temperatures were measured continuously in a climate chamber with an ambient temperature of 22 degreesC for I h and subsequently 3 h of 15 degreesC. The average metabolic response during cold exposure, measured as the increase in kJ/min over time, was significantly higher in winter (11.5%) compared to summer (7.0%, P < .05). The temperature response was comparable in both seasons. The metabolic response in winter was significantly related to the response in summer (r(2)=.47, P < .001). Total heat production during cold exposure was inversely related to the 2 temperature response in both seasons (summer, r(2)=.39, P < .01; winter r(2)=.32, P < .05). In conclusion, the observed higher metabolic response in winter compared to summer indicates cold adaptation. The magnitude of the cold response varies, but the relative contribution of metabolic and temperature response was subject specific and consistent throughout the seasons, which can have implications for energy balance and body composition. (C) 2004 Elsevier Inc. All rights reserved.