Kauppinen K
Arctic Med Res. 1989 Apr;48(2):64-74.
Nine men were subjected to four temperature exposures: (A) sauna and head-out ice water immersion; (B) sauna and 15 degrees C shower; (C) sauna and room temperature; (D) head-out ice water immersion and room temperature. Exposures were repeated and ended with a 30-minute recovery. Heart rates were recorded continuously and blood pressures were determined six times during each experiment. Rate pressure products and indications of cardiac stroke work were calculated from the data. The results demonstrated decreased total peripheral resistance (TPR) to the blood flow in response to the heat of the sauna (C), with concurrent increase in cardiac oxygen demand and negligible increase in the stroke work. Cold exposures (D) increased the TPR. Cold did not increase the cardiac oxygen demand but increased the stroke work. The alternation of heat and cold (A) or cool (B) presented the most intensive strain on the heart.
(A) 桑拿浴和头部露出的冰水浸泡；(B) 桑拿浴和15摄氏度淋浴；(C) 桑拿浴和室温；(D) 头部露出的冰水浸泡和室温。暴露试验重复进行，并以30分钟的恢复结束。在每个实验过程中持续记录心率，并六次测定血压。根据这些数据计算速率压力乘积和心搏功指标。结果表明，响应桑拿浴的热量（C），总外周阻力（TPR）对血流降低，同时心脏需氧量增加，而心搏功增加可忽略不计。冷暴露（D）增加了TPR。寒冷并未增加心脏需氧量，但增加了心搏功。热与冷（A）或凉爽（B）的交替对心脏造成了最强烈的压力。
