Yoon Ji-Yeon, Lee Mi-Ra, An Duk-Hyun
Motion Analysis Laboratory, Inje University Haeundae Paik Hospital, Republic of Korea.
Department of Physical Therapy, Wooridul Hospital, Republic of Korea.
J Phys Ther Sci. 2015 Apr;27(4):1195-7. doi: 10.1589/jpts.27.1195. Epub 2015 Apr 30.
[Purpose] The aim of this study was to identify the effects of initial position of the hip joint with changes in the hip joint angle on the respective muscle activities of the bilateral erector spinae (ES), unilateral gluteus maximus (GM), and biceps femoris (BF) and the amount of pelvic anterior tilt during prone hip extension (PHE). [Subjects] Fifteen healthy volunteers were enrolled in this study. [Methods] The subjects performed PHE in three positions: neutral, 20°, and 45° flexed hip joint. The activities of the ES, GM, and BF were measured using surface electromyography, and kinematic values for pelvic anterior tilt were calculated using a motion capture system. [Results] There was a significant decrease in muscle activity of the contralateral ES at 45°, and an increase in the GM muscle activity and decrease in the BF muscle activity at 20°. The amount of pelvic anterior tilt was lower at 20°. [Conclusion] These results suggest that a hip flexion position of 20° would have an advantage over the other measured positions.
[目的] 本研究旨在确定髋关节初始位置以及髋关节角度变化对双侧竖脊肌（ES）、单侧臀大肌（GM）和股二头肌（BF）各自肌肉活动的影响，以及俯卧位髋关节伸展（PHE）过程中骨盆前倾的程度。[对象] 15名健康志愿者参与了本研究。[方法] 受试者在三个位置进行PHE：髋关节中立位、屈曲20°和45°。使用表面肌电图测量ES、GM和BF的活动，并使用运动捕捉系统计算骨盆前倾的运动学值。[结果] 在45°时，对侧ES的肌肉活动显著降低，在20°时，GM肌肉活动增加，BF肌肉活动减少。在20°时，骨盆前倾程度较低。[结论] 这些结果表明，20°的髋关节屈曲位置相对于其他测量位置具有优势。
