Worrell T W, Smith T L, Winegardner J
Krannert School of Physical Therapy, University of Indianapolis, IN 46227-3697.
J Orthop Sports Phys Ther. 1994 Sep;20(3):154-9. doi: 10.2519/jospt.1994.20.3.154.
The relationship between hamstring flexibility and hamstring muscle performance has not been reported. The purposes of this study were 1) to determine the most effective stretching method for increasing hamstring flexibility and 2) to determine the effects of increasing hamstring flexibility on isokinetic peak torque. Nineteen subjects participated in this study. A two-way analysis of variance was used to compare two stretching techniques: proprioceptive neuromuscular facilitation stretch and static stretch. A one-way repeated measures analysis of variance was used to compare hamstring isokinetic values pre- and poststretching. No significant increase occurred (p < .05) in hamstring flexibility even though increases occurred with each technique: static stretch (+21.3%) and proprioceptive neuromuscular facilitation (+25.7%). Significant increases occurred in peak torque eccentrically at 60 degrees/sec (p < .05, +8.5%) and 120 degrees/sec (p < .05, +13.5%) and concentrically at 120 degrees/sec (p < .05, +11.2%). No significant increase occurred at 60 degrees/sec (p > .05, +2.5%). We concluded that increasing hamstring flexibility was an effective method for increasing hamstring muscle performance at selective isokinetic conditions. Further study is needed to determine if increasing hamstring flexibility will increase performance in closed kinetic chain activities.
绳肌柔韧性与绳肌肌肉表现之间的关系尚未见报道。本研究的目的是：1）确定增加绳肌柔韧性的最有效拉伸方法；2）确定增加绳肌柔韧性对等速峰值扭矩的影响。19名受试者参与了本研究。采用双向方差分析来比较两种拉伸技术：本体感觉神经肌肉促进法拉伸和静态拉伸。采用单向重复测量方差分析来比较拉伸前后绳肌的等速值。尽管两种技术（静态拉伸增加21.3%，本体感觉神经肌肉促进法增加25.7%）都使绳肌柔韧性有所增加，但均未出现显著增加（p < .05）。在60度/秒（p < .05，增加8.5%）和120度/秒（p < .05，增加13.5%）的离心峰值扭矩以及120度/秒（p < .05，增加11.2%）的向心峰值扭矩均出现显著增加。在60度/秒时未出现显著增加（p > .05，增加2.5%）。我们得出结论，在选择性等速条件下，增加绳肌柔韧性是提高绳肌肌肉表现的有效方法。需要进一步研究以确定增加绳肌柔韧性是否会提高闭链活动中的表现。
