The effect of repeated mild cold water immersions on the adaptation of the vasomotor responses
The effect of repeated mild cold water immersions on the adaptation of the vasomotor responses
复制标题
反复轻度冷水浸泡对血管舒缩反应适应的影响
DOI：
10.1007/s00484-011-0462-1
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发表时间：
2011
影响因子：
3.2
通讯作者：
Tochihara Y
中科院分区：
文献类型：
--
作者：
Wakabayashi H;Wijayanto T;Kuroki H;Lee JY;Tochihara Y
有几种类型的冷适应的基础上改变的体温调节反应。人们认为，在适应期内反复冷暴露的温度是影响冷适应类型的因素之一。本研究验证了以下假设：反复轻度冷浸泡会诱导绝缘冷适应，但不会改变代谢反应。7名健康男性参与者在26°C水中反复浸入剑突水平60分钟，每周3天，持续4周。在第一次和最后一次暴露的冷驯化期间，参与者进行了身体浸泡测试，测量他们对寒冷的体温调节反应。另外，他们将手指浸入5°C水中30分钟，以评估冷适应前后的冷诱导血管舒张（CIVD）反应。在浸泡剑突过程中，参与者表现出显着较低的平均皮肤温度和皮肤血流量在前臂后适应，而没有适应观察到的代谢反应。此外，冷驯化后观察到CIVD反应减弱。根据这些结果，认为参与者在反复轻度冷浸泡后表现出绝缘型的冷适应。这项研究的主要发现是接受的假设，反复轻度冷浸泡是足以诱导绝缘冷适应，但不改变代谢反应。提示体温调节反应中的适应是适应过程中反复刺激的反应所特有的。
There are several types of cold adaptation based on the alteration of thermoregulatory response. It has been thought that the temperature of repeated cold exposures during the adaptation period is one of the factors affecting the type of cold adaptation developed. This study tested the hypothesis that repeated mild cold immersions would induce an insulative cold adaptation but would not alter the metabolic response. Seven healthy male participants were immersed to their xiphoid process level repeatedly in 26°C water for 60 min, 3 days every week, for 4 weeks. During the first and last exposure of this cold acclimation period, the participants underwent body immersion tests measuring their thermoregulatory responses to cold. Separately, they conducted finger immersion into 5°C water for 30 min to assess their cold-induced vasodilation (CIVD) response before and after cold acclimation. During the immersion to xiphoid process, participants showed significantly lower mean skin temperature and skin blood flow in the forearm post-acclimation, while no adaptation was observed in the metabolic response. Additionally, blunted CIVD responses were observed after cold acclimation. From these results, it was considered that the participants showed an insulative-type of cold acclimation after the repeated mild cold immersions. The major finding of this study was the acceptance of the hypothesis that repeated mild cold immersion was sufficient to induce insulative cold adaptation but did not alter the metabolic response. It is suggested that the adaptation in the thermoregulatory response is specific to the response which is repeatedly stimulated during the adaptation process.