Vujnovich A L, Dawson N J
School of Physiotherapy, Auckland Institute of Technology, New Zealand.
J Orthop Sports Phys Ther. 1994 Sep;20(3):145-53. doi: 10.2519/jospt.1994.20.3.145.
Therapeutic muscle stretch is a commonly used procedure despite little evidence in support of efficacy or information about the mechanisms underlying the various methods. The purpose of this work was to compare the sequential application of static and ballistic muscle stretch with static muscle stretch alone, using the electrically elicited Hoffmann reflex (H-reflex) as a measure of excitability of homonymous motoneurons. The foot was passively dorsiflexed and either maintained in this position or rapidly and repeatedly dorsiflexed at a velocity of 1.0 radian/sec. Hoffmann reflexes were taken using established criteria under control conditions and during stretch conditions. An analysis of variance indicated a significant difference (p < 0.05) between condition means, with H-reflex amplitude reducing to 60 and 15% of the control value during static and ballistic stretch, respectively. Since reductions in alpha-motoneuron pool excitability correlate with increased flexibility, ballistic stretch applied following static stretch appears more effective than static stretch alone.
治疗性肌肉拉伸是一种常用的方法，尽管几乎没有证据支持其有效性，也缺乏关于各种方法背后机制的信息。这项研究的目的是比较静态和弹道式肌肉拉伸的顺序应用与单独的静态肌肉拉伸，使用电诱发霍夫曼反射（H反射）作为同名运动神经元兴奋性的指标。足部被被动背屈，并保持在该位置或快速反复以1.0弧度/秒的速度背屈。在对照条件和拉伸条件下，根据既定标准采集霍夫曼反射。方差分析表明，不同条件下的均值存在显著差异（p < 0.05），在静态和弹道式拉伸过程中，H反射幅度分别降至对照值的60%和15%。由于α运动神经元池兴奋性的降低与柔韧性增加相关，因此在静态拉伸后进行弹道式拉伸似乎比单独的静态拉伸更有效。
