This study aimed to determine the effect of 16 minutes of thermal stress followed by 2 minutes of cold water immersion on the physiological parameters of fifty-five sedentary men (mean age 20.15±1.30 years), who were exposed to 16 minutes of sauna (temperature: 90-91°C; relative humidity: 14-16%) followed by 2 minutes of cold water immersion (12°C). The participants' somatic characteristics were determined before entering the sauna, and their body mass and blood pressure were measured before and after sauna treatment. Physiological parameters were monitored during the 16-minute sauna session and the 2-minute cold water immersion (CRIO) or shower. The subjects perspired 0.21-0.27 litres during the 18-minute session. Heart rate values did not differ significantly between groups during the 16-minute sauna session, but significantly (p<0.001) lower HR values were noted in the CRIO group than in the control group (68.6:105.7 and 57.5:90.7 bpm). The values of SBP and DBP did not differ significantly between groups before the sauna but were significantly (p<0.001) lower in the CRIO group after sauna (SBP – 122.0:127.3 mmHg, DBP – 89.9:76.3 mmHg). In both groups, the participants remained within the easy effort range during most of the 18-minute session (650.9 and 492.6 s). A 16-minute sauna session followed by 2 minutes of cold water immersion induces a significantly greater decrease in HR and BP (SBP and DBP) than a 16-minute sauna session followed by 30 seconds in the shower and a 90 s resting period. During cold water immersion, HR values often decrease to the bradycardia range. Heart rate increased steadily in both groups.

中文翻译：

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16分钟热应力和2分钟冷水浸没对久坐不动的青年生理指标的影响

这项研究旨在确定16分钟热应激，然后浸泡2分钟冷水对55名久坐了16分钟桑拿浴（温度为20.15±1.30岁）的久坐男性的生理参数的影响。 ：90-91℃；相对湿度：14-16％），然后浸泡2分钟冷水（12℃）。参加者在进入桑拿之前先确定他们的身体特征，并在进行桑拿之前和之后测量他们的体重和血压。在16分钟的桑拿浴和2分钟的冷水浸泡（CRIO）或淋浴期间监测生理参数。在18分钟的训练过程中，受试者出汗0.21-0.27升。在16分钟的桑拿期间，两组之间的心率值无显着差异，但差异显着（p <0。001）CRIO组的HR值低于对照组（68.6：105.7和57.5：90.7 bpm）。桑拿之前，两组之间的SBP和DBP值没有显着差异，但是在桑拿之后，CRIO组的SBP和DBP值显着降低（p <0.001）（SBP – 122.0：127.3 mmHg，DBP – 89.9：76.3 mmHg）。在两组中，参与者在18分钟的会议中的大部分时间（650.9和492.6 s）都保持在轻松工作范围内。经过16分钟的桑拿浴，再加上2分钟的冷水浸泡，与16分钟的桑拿浴，随后的30秒淋浴和90 s的休息时间相比，HR和BP（SBP和DBP）的下降明显更大。在冷水浸泡期间，HR值通常会降低到心动过缓范围。两组的心率均稳步上升。