Webright W G, Randolph B J, Perrin D H
University of Virginia, Charlottesville 22903, USA.
J Orthop Sports Phys Ther. 1997 Jul;26(1):7-13. doi: 10.2519/jospt.1997.26.1.7.
Nonballistic, active range of motion exercises have been advocated as more effective than static stretching for increasing range of motion, yet no published data exist to support this claim. This study compared the effect of nonballistic, repetitive active knee extension movements performed in a neural slump sitting position with static stretching technique on hamstring flexibility. Forty healthy, adult volunteer subjects with limited right hamstring flexibility (i.e., minimum of 15 degrees loss of active knee extension measured with femur held at 90 degrees of hip flexion) were randomly assigned to one of three groups. Group 1 (static stretch) performed a 30-second stretch twice daily. Group 2 (active stretch) performed 30 repetitions of active knee extension while sitting in a neural slump position twice daily. Group 3 served as a control. Hamstring flexibility was determined by an active knee extension test before and after 6 weeks of stretching. Goniometric measurement of knee joint flexion angle was obtained from videotape recording of the active knee extension test. A 3 (group) x 2 (test) repeated measures analysis of variance and subsequent Tukey post hoc testing revealed no significant difference in knee joint range of motion gains between the static (mean = 8.9 degrees) and active stretch (mean = 10.2 degrees). Both stretch groups' knee joint range of motion improved significantly (p < .05) more than the control group. We conclude that 6 weeks of nonballistic, repetitive active knee extensions (30 repetitions, twice daily) performed in a neural slump sitting position improves hamstring flexibility in uninjured subjects, but is no different compared with static stretching (30 seconds, twice daily).
非弹道式主动活动度练习被认为比静态拉伸在增加活动度方面更有效，但尚无已发表的数据支持这一说法。本研究比较了在神经松弛坐姿下进行的非弹道式、重复性主动膝关节伸展运动与静态拉伸技术对腘绳肌柔韧性的影响。40名右腘绳肌柔韧性受限的健康成年志愿者（即，在髋关节屈曲90度时测量，主动膝关节伸展至少损失15度）被随机分为三组。第1组（静态拉伸）每天进行两次30秒的拉伸。第2组（主动拉伸）每天两次坐在神经松弛位置进行30次主动膝关节伸展。第3组作为对照组。在拉伸6周前后通过主动膝关节伸展测试确定腘绳肌柔韧性。从主动膝关节伸展测试的录像中获得膝关节屈曲角度的角度测量值。一个3（组）×2（测试）重复测量方差分析及随后的Tukey事后检验显示，静态拉伸组（平均 = 8.9度）和主动拉伸组（平均 = 10.2度）之间膝关节活动度增加没有显著差异。两个拉伸组的膝关节活动度均比对照组有显著改善（p < .05）。我们得出结论，在神经松弛坐姿下进行6周的非弹道式、重复性主动膝关节伸展（30次，每天两次）可改善未受伤受试者的腘绳肌柔韧性，但与静态拉伸（30秒，每天两次）相比没有差异。
