Choo Hui C, Nosaka Kazunori, Peiffer Jeremiah J, Ihsan Mohammed, Yeo Chow C, Abbiss Chris R
Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia.
School of Psychology and Exercise Science, Murdoch University, Murdoch, WA, Australia.
Clin Physiol Funct Imaging. 2018 Jan;38(1):46-55. doi: 10.1111/cpf.12380. Epub 2016 Jul 28.
This study compared the effect of postexercise water immersion (WI) at different temperatures on common femoral artery blood flow (CFA), muscle (total haemoglobin; tHb) and skin perfusion (cutaneous vascular conductance; CVC), assessed by Doppler ultrasound, near-infrared spectroscopy (NIRS) and laser Doppler flowmetry, respectively. Given that heat stress may influence the vascular response during cooling, nine men cycled for 25 min at the first ventilatory threshold followed by intermittent 30-s cycling at 90% peak power until exhaustion at 32·8 ± 0·4°C and 32 ± 5% RH. They then received 5-min WI at 8·6 ± 0·2°C (WI ), 14·6 ± 0·3°C (WI ), 35·0 ± 0·4°C (WI ) or passive rest (CON) in a randomized, crossover manner. Heart rate (HR), mean arterial pressure (MAP), muscle (T ), thigh skin (T ), rectal (T ) and mean body (T ) temperatures were assessed. At 60 min postimmersion, decreases in T after WI (-0·6 ± 0·3°C) and CON (-0·6 ± 0·3°C) were different from WI (-1·0 ± 0·3°C; P<0·05), but not from WI (-1·0 ± 0·3°C; P = 0·074-0·092). WI and WI had reduced T , T and T compared with WI and CON (P <0·05). CFA, tHb and CVC were lower in WI and WI compared with CON (P<0·05). tHb following WI remained lower than CON (P = 0·044) at 30 min postimmersion. CVC correlated with tHb during non-cooling (WI and CON) (r = 0·532; P<0·001) and cooling recovery (WI and WI ) (r = 0·19; P = 0·035). WI resulted in prolonged reduction in muscle perfusion. This suggests that CWI below 10°C should not be used for short-term (i.e. <60 min) recovery after exercise.
本研究比较了不同温度的运动后水浸（WI）对股总动脉血流量（CFA）、肌肉（总血红蛋白；tHb）和皮肤灌注（皮肤血管传导率；CVC）的影响，分别通过多普勒超声、近红外光谱（NIRS）和激光多普勒血流仪进行评估。鉴于热应激可能会影响降温过程中的血管反应，9名男性在第一通气阈值下骑行25分钟，然后以90%峰值功率进行间歇性30秒骑行，直至在32.8±0.4°C和32±5%相对湿度下疲劳。然后，他们以随机交叉的方式接受8.6±0.2°C（WI）、14.6±0.3°C（WI）、35.0±0.4°C（WI）的5分钟水浸或被动休息（CON）。评估心率（HR）、平均动脉压（MAP）、肌肉温度（T）、大腿皮肤温度（T）、直肠温度（T）和平均体温（T）。在浸浴后60分钟，WI（-0.6±0.3°C）和CON（-0.6±0.3°C）后的T下降与WI（-1.0±0.3°C；P<0.05）不同，但与WI（-1.0±0.3°C；P = 0.074 - 0.092）无差异。与WI和CON相比，WI和WI的T、T和T降低（P<0.05）。与CON相比，WI和WI的CFA、tHb和CVC较低（P<0.05）。浸浴后30分钟，WI后的tHb仍低于CON（P = 0.044）。在非降温（WI和CON）期间（r = 0.532；P<0.001）和降温恢复（WI和WI）期间（r = 0.19；P = 0.035），CVC与tHb相关。WI导致肌肉灌注的减少持续时间延长。这表明低于10°C的冷水浸浴不应用于运动后的短期（即<60分钟）恢复。
