Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan.
J Electromyogr Kinesiol. 2012 Jun;22(3):391-7. doi: 10.1016/j.jelekin.2012.03.003. Epub 2012 Mar 28.
Prone hip extension has been used as a self-perturbation task to test the stability of the lumbopelvic region. However, the relationship between recruitment patterns in the hip and trunk muscles and lumbopelvic kinematics remains unknown. The present study aimed to examine if the balance of hip and trunk muscle activities are related to pelvic motion and low back muscle activity during prone hip extension. Sixteen healthy participants performed prone hip extension from 30° of hip flexion to 10° of hip extension. Surface electromyography (of the gluteus maximus, semitendinosus, rectus femoris, tensor fasciae latae, multifidus, and erector spinae) and pelvic kinematic measurements were collected. Results showed that increased activity of the hip flexor (tensor fasciae latae) relative to that of hip extensors (gluteus maximus and semitendinosus) was significantly associated with increased anterior pelvic tilt during hip extension (r=0.52). Increased anterior pelvic tilt was also significantly related to the delayed onset timing of the contralateral and ipsilateral multifidus (r=0.57, r=0.53) and contralateral erector spinae (r=0.63). Additionally, the decrease of the gluteus maximus activity relative to the semitendinosus was significantly related to increased muscle activity of the ipsilateral erector spinae (r=-0.57). These results indicate that imbalance between the agonist and antagonist hip muscles and delayed trunk muscle onset would increase motion in the lumbopelvic region.
俯卧髋关节伸展已被用作自我扰动任务，以测试腰骶区的稳定性。然而，髋关节和躯干肌肉的募集模式与腰骶运动学之间的关系尚不清楚。本研究旨在探讨在俯卧髋关节伸展时，髋关节和躯干肌肉活动的平衡是否与骨盆运动和腰背肌肉活动有关。16 名健康参与者从髋关节屈曲 30°到伸展 10°进行俯卧髋关节伸展。采集表面肌电图（臀大肌、半腱肌、股直肌、阔筋膜张肌、多裂肌和竖脊肌）和骨盆运动学测量数据。结果表明，髋关节屈肌（阔筋膜张肌）的活动相对于髋关节伸肌（臀大肌和半腱肌）增加与髋关节伸展时前骨盆倾斜增加显著相关（r=0.52）。前骨盆倾斜增加也与对侧和同侧多裂肌（r=0.57，r=0.53）和对侧竖脊肌（r=0.63）的延迟起始时间显著相关。此外，臀大肌的活动相对于半腱肌的下降与同侧竖脊肌的肌肉活动增加显著相关（r=-0.57）。这些结果表明，髋关节主动肌和拮抗肌之间的不平衡以及躯干肌肉起始延迟会增加腰骶区的运动。
