Department of Physical Education and Sport Sciences, University of Limerick, Castletroy, Limerick, Ireland.
Scand J Med Sci Sports. 2012 Apr;22(2):190-8. doi: 10.1111/j.1600-0838.2011.01292.x. Epub 2011 Apr 8.
The purpose of this study was to investigate the effects of whole-body cryotherapy (WBC) on proprioceptive function, muscle force recovery following eccentric muscle contractions and tympanic temperature (T(TY) ). Thirty-six subjects were randomly assigned to a group receiving two 3-min treatments of -110 ± 3 °C or 15 ± 3 °C. Knee joint position sense (JPS), maximal voluntary isometric contraction (MVIC) of the knee extensors, force proprioception and T(TY) were recorded before, immediately after the exposure and again 15 min later. A convenience sample of 18 subjects also underwent an eccentric exercise protocol on their contralateral left leg 24 h before exposure. MVIC (left knee), peak power output (PPO) during a repeated sprint on a cycle ergometer and muscles soreness were measured pre-, 24, 48 and 72h post-treatment. WBC reduced T(TY) , by 0.3 °C, when compared with the control group (P<0.001). However, JPS, MVIC or force proprioception was not affected. Similarly, WBC did not effect MVIC, PPO or muscle soreness following eccentric exercise. WBC, administered 24 h after eccentric exercise, is ineffective in alleviating muscle soreness or enhancing muscle force recovery. The results of this study also indicate no increased risk of proprioceptive-related injury following WBC.
本研究旨在探讨全身冷冻疗法(WBC)对本体感觉功能、离心收缩后肌肉力量恢复和鼓膜温度(T(TY))的影响。36 名受试者被随机分为两组,分别接受-110±3°C 或 15±3°C 的 3 分钟治疗。在暴露前、暴露后立即和 15 分钟后记录膝关节位置感(JPS)、膝关节伸肌的最大自主等长收缩(MVIC)、力量本体感觉和 T(TY)。18 名受试者还在暴露前 24 小时对其对侧左腿进行了离心运动方案。在循环测功计上进行重复冲刺时测量 MVIC(左膝)、峰值功率输出(PPO)和肌肉酸痛。与对照组相比,WBC 降低了 0.3°C(P<0.001)。然而,JPS、MVIC 或力量本体感觉不受影响。同样,WBC 对离心运动后的 MVIC、PPO 或肌肉酸痛也没有影响。在离心运动后 24 小时给予 WBC 治疗,不能缓解肌肉酸痛或增强肌肉力量恢复。本研究的结果还表明,WBC 后没有增加与本体感觉相关的损伤风险。
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