SEASONAL ACCLIMATIZATION TO COLD IN MAN
SEASONAL ACCLIMATIZATION TO COLD IN MAN
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DOI：
10.1152/jappl.1961.16.2.231
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发表时间：
1961-01-01
影响因子：
3.3
通讯作者：
JOHNSTON, DR
中科院分区：
文献类型：
--
作者：
DAVIS, TR;JOHNSTON, DR
从10月到2月，每月测量一次6名受试者的寒战、产热以及直肠和皮肤温度的变化，这些变化是由14.1 [±] 0.46[degree]C的标准冷暴露1小时产生的。第二组5名受试者的反应从2月到9月每月测量一次，在13.7 [±] 0.9[degree]C的寒冷暴露期间。在10月至2月组中，寒战下降至1月平均值为10月数字的7%（P < 0.01）。2月份冷诱导产热下降到10月份的52%（P < 0.05）。在整个研究期间，平均直肠温度和平均体表温度没有一致的显著变化。寒战的减少与寒战发作的表面温度阈值的变化有关。2 ~ 9月组寒战增加，9月达到高峰（P < 0.01）。同样，无法证明体表或直肠温度的持续显著变化。观察到的颤抖的高度显著变化和产热的不太显著的变化表明，人季节性地适应寒冷，这种获得的适应在夏季丧失。
Six subjects were measured once monthly from October to February for alterations in shivering, heat production, and rectal and skin temperatures produced by a standard cold exposure of 14.1 [plus or minus] 0.46[degree]C for 1 hour. The responses of a second group of five subjects were measured once monthly from February to September during a cold exposure of 13.7 [plus or minus] 0.9[degree]C. In the October-February group, shivering decreased to a January mean value 7% of the October figure (P < 0.01). Cold-induced heat production decreased in February to a value 52% of the October figure (P < 0.05). Mean rectal temperature and mean surface temperature over the total period of study showed no consistently significant change. The decrease in shivering was associated with a change in the surface temperature threshold of shivering onset. The February-September group showed an increase in shivering reaching a maximum in September (P < 0.01). Again consistently significant alteration in surface or rectal temperature could not be demonstrated. The highly significant change in shivering and the less significant change in heat production observed suggests that man seasonally acclimatizes to cold and that this acquired acclimatization is lost during the summer months.