The purpose of the present study was to evaluate the effectiveness of passive and post-exercise heat acclimation strategies through directly heating the skin with a water-perfused suit. Nineteen young males participated in the heat acclimation (HA) protocols for 10 days, which were conducted at an air temperature of 33oC with 60%RH. The exercise-only condition (N = 6) conducted 1-h treadmill walking (6 km·h-1) followed by 1-h rest. The post-exercise passive-heating condition (N = 6) wore the suit (inflow water temperature 44.2oC) for 1-h after 1-h walking. The passive-heating condition (N = 7) donned the suit for 2 h. Heat tolerance tests (leg immersion in 42oC water for 60 min) were conducted before and after the training to evaluate changes due to the 10-day intervention. Reflecting that suit-wearing for 10 days as both passive and post-exercise HA strategies can effectively induce adaptive changes, significant interaction effects appeared in: increase or decrease in mean skin temperature (P < 0.05) and elevation in whole-body sweat rate (P < 0.05). Reduction in rectal temperature (P < 0.05) and blood pressure (P < 0.05) were found most prominently in the passive-heating condition. These results indicate that this new method of heat acclimation training, donning a skin-heating water-perfused suit, can generate thermoregulatory benefits. The passive HA intervention could be applied to individuals for whom doing exercise regularly are not feasible.

中文翻译：

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使用水灌注服作为被动和运动后热适应策略的皮肤加热的有效性

本研究的目的是通过用水灌注套装直接加热皮肤来评估被动和运动后热适应策略的有效性。19 名年轻男性参加了为期 10 天的热适应 (HA) 协议，该协议在 33oC 的空气温度和 60%RH 下进行。仅运动条件 (N = 6) 进行 1 小时跑步机步行 (6 km·h-1)，然后休息 1 小时。运动后被动加热条件（N = 6）穿着西装（进水温度44.2oC）1小时步行1小时。被动加热条件 (N = 7) 穿上防护服 2 小时。耐热测试（腿浸入 42oC 水中 60 分钟）在训练前后进行，以评估由于 10 天干预引起的变化。反映穿西装10天作为被动和运动后HA策略都可以有效诱导适应性变化，显着的交互效应出现在：平均皮肤温度升高或降低（P < 0.05）和全身出汗率升高（ P < 0.05)。在被动加热条件下，直肠温度（P < 0.05）和血压（P < 0.05）的降低最为显着。这些结果表明，这种热适应训练的新方法，穿上皮肤加热水灌注服，可以产生体温调节益处。被动 HA 干预可应用于无法定期锻炼的个人。05）和全身出汗率升高（P < 0.05）。在被动加热条件下，直肠温度（P < 0.05）和血压（P < 0.05）的降低最为显着。这些结果表明，这种热适应训练的新方法，穿上皮肤加热水灌注服，可以产生体温调节益处。被动 HA 干预可应用于无法定期锻炼的个人。05）和全身出汗率升高（P < 0.05）。在被动加热条件下，直肠温度（P < 0.05）和血压（P < 0.05）的降低最为显着。这些结果表明，这种热适应训练的新方法，穿上皮肤加热水灌注服，可以产生体温调节益处。被动 HA 干预可应用于无法定期锻炼的个人。