This study examined the effectiveness of a field-type liquid cooling vest (LCV) worn underneath an impermeable protective suit on heat strain during walking. Eight men walked for 60 min at a moderate speed (3.0 km/h) wearing the suit in a warm environment (33°C, 60% relative humidity) without (control, CON) or with the LCV. A smaller increase in rectal temperature was recorded in participants in the LCV than in the CON condition (37.6 ± 0.1°C vs. 37.9 ± 0.1°C, p<0.05). Walking while wearing the LCV reduced the level of physiological heat strain, as measured by the mean skin temperature (35.5 ± 0.1°C vs. 36.3 ± 0.1°C), chest sweat rate (13.5 ± 3.0 mg/cm2/h vs. 16.6 ± 3.8 mg/cm2/h), chest cutaneous vascular conductance (349 ± 88% vs. 463 ± 122%), body weight loss (0.72 ± 0.05% vs. 0.93 ± 0.06%), and heart rate (101 ± 6 beats/min vs. 111 ± 7 beats/min) (p<0.05, for all comparisons). These changes were accompanied by a decrease in thermal sensation and discomfort. These results suggest that a field-type LCV attenuates exertional heat strain while wearing impermeable protective clothing.

中文翻译：

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现场型液体冷却背心在穿着防护服时减少热应力的功效。

这项研究检查了穿在不渗透性防护服下面的野外型液体冷却背心（LCV）对行走过程中热应力的有效性。八名男子在没有（对照，CON）或没有LCV的温暖环境（33°C，相对湿度60％）中穿着西装以中等速度（3.0 km / h）行走60分钟。与CON状态相比，LCV参与者的直肠温度升高幅度较小（37.6±0.1°C vs. 37.9±0.1°C，p <0.05）。佩戴LCV时行走可降低生理热应激的水平，该水平由平均皮肤温度（35.5±0.1°C对36.3±0.1°C），胸部出汗率（13.5±3.0 mg / cm2 / h对16.6）测量。 ±3.8 mg / cm2 / h），胸部皮肤血管电导率（349±88％对463±122％），体重减轻（0.72±0.05％对0.93±0.06％）和心率（101±6拍） /分钟与 111±7次/分钟）（对于所有比较，p <0.05）。这些变化伴随着热感和不适感的降低。这些结果表明，现场型LCV穿着不透水的防护服时可减轻劳累性热应变。