Francisco Michael A, Colbert Cameron, Larson Emily A, Sieck Dylan C, Halliwill John R, Minson Christopher T
Department of Human Physiology, University of Oregon, United States.
J Appl Physiol (1985). 2021 Feb 25;130(5):1362-72. doi: 10.1152/japplphysiol.00260.2020.
This study sought to compare the hemodynamics of the recovery periods following exercise versus hot water immersion. Twelve subjects (6 F, 22.7 ± 0.8 y; BMI: 21.8 ± 2.1 kg·m) exercised for 60 minutes at 60% VOpeak or were immersed in 40.5C water for 60 minutes on separate days, in random order. Measurements were made before, during, and for 60-minutes post-intervention (i.e., recovery) and included heart rate, arterial pressure, core temperature, and subjective measures. Brachial and superficial femoral artery blood flows were assessed using Doppler ultrasonography and cardiac output was measured using the acetylene wash-in method. Internal temperature increased to a similar extent during exercise and hot water immersion. Cardiac outputand mean arterial pressure were greater during exercise than during hot water immersion (both p<0.01). Sustained reductions in mean arterial pressure compared to baseline were observed in both conditions during recovery (p<0.001 vs before each intervention). Cardiac output was similar during recovery between the interventions. Stroke volume was reduced throughout recovery following exercise, but not following hot water immersion (p<0.01). Brachial artery retrograde shear was reduced following hot water immersion, but not following exercise (Interaction; p=0.035). Antegrade shear in the superficial femoral artery was elevated compared to baseline (p=0.027) for 60 minutes following exercise, whereas it returned near baseline values (p=0.564) by 40 minutes following hot water immersion. Many of the changes observed during the post-exercise recovery period that are thought to contribute to long-term beneficial cardiovascular adaptations were also observed during the post-hot water immersion recovery period.
本研究旨在比较运动恢复期与热水浸泡恢复期的血流动力学。12名受试者（6名女性，年龄22.7±0.8岁；体重指数：21.8±2.1kg·m²）在不同日期分别以60%最大摄氧量进行60分钟运动，或以40.5℃的水温浸泡60分钟，顺序随机。在干预前、干预期间以及干预后60分钟（即恢复期）进行测量，测量指标包括心率、动脉压、核心体温和主观指标。使用多普勒超声评估肱动脉和股浅动脉血流，采用乙炔注入法测量心输出量。运动和热水浸泡期间，体内温度升高幅度相似。运动期间的心输出量和平均动脉压高于热水浸泡期间（均p<0.01）。在恢复期，两种情况下均观察到平均动脉压与基线相比持续降低（与每次干预前相比，p<0.001）。干预之间恢复期的心输出量相似。运动后整个恢复期的每搏输出量降低，但热水浸泡后未降低（p<0.01）。热水浸泡后肱动脉逆行切变降低，但运动后未降低（交互作用；p=0.035）。运动后60分钟内，股浅动脉的顺行切变高于基线（p=0.027），而热水浸泡后40分钟时恢复至接近基线值（p=0.564）。在运动后恢复期观察到的许多被认为有助于长期有益心血管适应的变化，在热水浸泡后恢复期也有观察到。
