Fukuchi Claudiane Arakaki, da Rocha Emmanuel Souza, Stefanyshyn Darren John
a Faculty of Kinesiology , University of Calgary , Calgary , Canada.
J Sports Sci. 2015;33(5):449-56. doi: 10.1080/02640414.2014.946952. Epub 2014 Sep 26.
The purpose of this study was to identify the influence of cryotherapy on lower extremity running biomechanics. Twenty-six healthy male volunteers were randomised into two intervention groups: cold water (cold water at ~11°C) or tepid water (tepid water at ~26°C). They were required to run at 4.0 ± 0.2 m · s(-1) before and after they underwent water immersion for 20 min. Differences between pre- and post-intervention were used to compare the influence of water intervention during running. Peak joint angles, peak joint moments, peak ground reaction forces (GRF) and contact time (CT) were calculated using three-dimensional gait analysis. Independent t-tests were applied with a significant alpha level set at 0.05. Decreased peak propulsive and vertical GRF, decreased plantarflexion moments, increased hip flexion angle and longer CT were observed following cold water immersion. Although cold water immersion (cryotherapy) affected the running movement, none of the alterations have been related to running biomechanical patterns associated with injuries. Therefore, our results indicated that cold water immersion appears safe prior to running activities.
本研究的目的是确定冷冻疗法对下肢跑步生物力学的影响。26名健康男性志愿者被随机分为两个干预组：冷水组（约11°C的冷水）或温水组（约26°C的温水）。要求他们在进行20分钟水浸前后，以4.0±0.2米·秒（-1）的速度跑步。干预前后的差异用于比较跑步过程中水干预的影响。使用三维步态分析计算峰值关节角度、峰值关节力矩、峰值地面反作用力（GRF）和接触时间（CT）。采用独立t检验，显著α水平设定为0.05。冷水浸泡后观察到峰值推进力和垂直GRF降低、跖屈力矩降低、髋关节屈曲角度增加以及CT延长。虽然冷水浸泡（冷冻疗法）影响了跑步动作，但这些改变均与与损伤相关的跑步生物力学模式无关。因此，我们的结果表明，在跑步活动前进行冷水浸泡似乎是安全的。
