Kang Min-Hyeok, Jung Doh-Heon, An Duk-Hyun, Yoo Won-Gyu, Oh Jae-Seop
Department of Rehabilitation Science, Graduate School, INJE University, Gimhae City, Korea.
J Back Musculoskelet Rehabil. 2013;26(3):329-36. doi: 10.3233/BMR-130388.
Hamstring-stretching exercises are frequently used to change lumbar spine and hip movements in the clinic. However, little research into the effects of hamstring flexibility on lumbar spine and hip movements during lifting tasks has been reported.
We investigated effects of hamstring-stretching exercises on the kinematics of the lumbar spine and hip during stoop lifting.
We recruited 16 males with a reduced range of motion (ROM) in active knee extension (AKE). The angle of the lumbar spine and hip was measured during stoop lifting using a 3D motion-capture system. The ROM of AKE and the angle of the lumbar spine and hip during stoop lifting between pre- and post-stretching were analyzed using a paired t-test.
We found that hamstring-stretching exercises increased the ROM of AKE significantly. After hamstring-stretching exercises, there was a significant increase in hip flexion and decreases in both lumbar flexion and the lumbar/hip flexion ratio during the preparation phase of stoop lifting. In the lifting phase, only the movement range of the hip was increased significantly.
Hamstring-stretching exercises may be useful for decreasing lumbar flexion and increasing hip flexion in people who perform repetitive stoop lifting in the workplace or during daily activities.
在临床上，腘绳肌拉伸运动常用于改变腰椎和髋关节的活动。然而，关于腘绳肌柔韧性对提举任务中腰椎和髋关节活动影响的研究报道较少。
我们研究了腘绳肌拉伸运动对弯腰提举过程中腰椎和髋关节运动学的影响。
我们招募了16名主动膝关节伸展（AKE）活动范围减小的男性。使用三维运动捕捉系统在弯腰提举过程中测量腰椎和髋关节的角度。采用配对t检验分析拉伸前后AKE的活动范围以及弯腰提举过程中腰椎和髋关节的角度。
我们发现腘绳肌拉伸运动显著增加了AKE的活动范围。腘绳肌拉伸运动后，弯腰提举准备阶段髋关节屈曲显著增加，腰椎屈曲以及腰/髋屈曲比均降低。在提举阶段，仅髋关节的活动范围显著增加。
对于在工作场所或日常活动中进行重复性弯腰提举的人，腘绳肌拉伸运动可能有助于减少腰椎屈曲并增加髋关节屈曲。
