Department of Physical Education and Sport Sciences, University of Limerick, Castletroy, Co Limerick, Ireland.
J Sports Sci. 2011 Mar;29(5):449-56. doi: 10.1080/02640414.2010.544047.
The purpose of this study was to determine the effects of cryotherapy, in the form of cold water immersion, on knee joint position sense. Fourteen healthy volunteers, with no previous knee injury or pre-existing clinical condition, participated in this randomized cross-over trial. The intervention consisted of a 30-min immersion, to the level of the umbilicus, in either cold (14 ± 1 °C) or tepid water (28 ± 1 °C). Approximately one week later, in a randomized fashion, the volunteers completed the remaining immersion. Active ipsilateral limb repositioning sense of the right knee was measured, using weight-bearing and non-weight-bearing assessments, employing video-recorded 3D motion analysis. These assessments were conducted immediately before and after a cold and tepid water immersion. No significant differences were found between treatments for the absolute (P = 0.29), relative (P = 0.21) or variable error (P = 0.86). The average effect size of the outcome measures was modest (range -0.49 to 0.9) and all the associated 95% confidence intervals for these effect sizes crossed zero. These results indicate that there is no evidence of an enhanced risk of injury, following a return to sporting activity, after cold water immersion.
本研究旨在确定冷冻疗法（以冷水浸泡的形式）对膝关节位置感的影响。14 名健康志愿者参加了这项随机交叉试验，他们没有膝关节受伤史或既往临床疾病。干预措施包括在肚脐水平处进行 30 分钟的冷水（14 ± 1°C）或温水（28 ± 1°C）浸泡。大约一周后，志愿者以随机的方式完成其余的浸泡。使用带载和不带载的评估，通过视频记录的 3D 运动分析，测量右侧膝关节的主动同侧肢体定位感。这些评估在冷、温水浸泡前后进行。两种处理方法之间的绝对（P = 0.29）、相对（P = 0.21）或变量误差（P = 0.86）均无显著差异。结果测量的平均效应大小适中（范围-0.49 至 0.9），这些效应大小的所有相关 95%置信区间均跨越零。这些结果表明，冷水浸泡后，没有证据表明重返运动活动会增加受伤风险。
