Bohannon R W, Gibson D F
Phys Ther. 1985 Mar;65(3):312-3. doi: 10.1093/ptj/65.3.312.
Peak and angle specific knee extension torques produced after a quadriceps femoris muscle stretch and after a 15-second rest were compared to determine the effect of stretch on knee extension torque. Twenty healthy subjects performed eight maximum voluntary knee extensions at 90 degrees/sec under each condition. Although peak torque and torques at 15, 30, 45, and 60 degrees from full extension were measured, knee extension torque was only significantly greater (p less than .02) at 60 degrees of knee flexion after quadriceps femoris muscle stretch. The absolute difference, which was only a mean 4.9 N X m (3.6 ft-lb), was not substantial. When quadriceps femoris muscle stretch is a consequence of passive knee flexion at 90 degrees/sec, knee extension torque is apparently facilitated only during the initial part of the knee extension movement. Therefore, in healthy patients, a muscle stretch, such as used in this study, is probably of little therapeutic value.
比较股四头肌拉伸后以及休息15秒后产生的特定峰值和角度的膝关节伸展扭矩，以确定拉伸对膝关节伸展扭矩的影响。20名健康受试者在每种情况下以90度/秒的速度进行8次最大自主膝关节伸展。尽管测量了峰值扭矩以及从完全伸展开始在15、30、45和60度时的扭矩，但股四头肌拉伸后仅在膝关节屈曲60度时膝关节伸展扭矩显著更大（p小于0.02）。绝对差异仅平均为4.9牛·米（3.6英尺·磅），并不显著。当股四头肌拉伸是由以90度/秒的速度被动膝关节屈曲导致时，膝关节伸展扭矩显然仅在膝关节伸展运动的初始阶段得到促进。因此，在健康患者中，本研究中所采用的肌肉拉伸可能几乎没有治疗价值。
