Miyachi Ryo, Deguchi Miyuki, Nishi Yuki, Yonekura Sae, Hara Junko
Department of Physical Therapy, Faculty of Health Science, Kyoto Tachibana University: 34 Oyakeyamada-machi, Yamashina-ku, Kyoto 607-8175, Japan.
Department of Rehabilitation, Ishikawa-ken Saisekai Kanazawa Hospital, Japan.
J Phys Ther Sci. 2021 Apr;33(4):351-355. doi: 10.1589/jpts.33.351. Epub 2021 Apr 6.
[Purpose] This study aimed to investigate the relationships among the changes in iliopsoas muscle thickness, hip angle, and lower limb joint moment during squatting in different pelvic positions to help in performing hip-dominant squatting exercises. [Participants and Methods] The participants were seven healthy adult males. The measurement task consisted of squatting with 60 degrees of knee flexion in three positions: the anterior, neutral, and posterior pelvic tilt positions. The iliopsoas muscle thickness was measured in the center of the inguinal region using ultrasonography. A three-dimensional motion analysis system was used to measure the joint angles and joint moments. [Results] There were no significant differences in pelvic angles between the pelvic positions. The hip angle differences were significantly higher in the anterior and neutral pelvic tilt positions compared to those in the posterior tilt position. Only the anterior pelvic tilt position had a significantly positive correlation with iliopsoas muscle thickness and hip angle differences. [Conclusion] Squatting in the neutral or posterior pelvic tilt position was not associated with hip angle and iliopsoas muscle thickness changes, whereas squatting in an anterior pelvic tilt position was associated with changes in the iliopsoas muscle thickness and hip flexion angle. Our findings suggest that activation of the iliopsoas muscle might be necessary to promote hip-dominant squatting.
[目的] 本研究旨在探究不同骨盆位置下蹲过程中髂腰肌厚度变化、髋关节角度和下肢关节力矩之间的关系，以助力进行以髋关节为主导的下蹲练习。[参与者与方法] 参与者为7名健康成年男性。测量任务包括在三个位置进行膝关节屈曲60度的下蹲：骨盆前倾、中立和后倾位置。使用超声在腹股沟区中心测量髂腰肌厚度。采用三维运动分析系统测量关节角度和关节力矩。[结果] 不同骨盆位置之间的骨盆角度无显著差异。与后倾位置相比，前倾和中立骨盆倾斜位置的髋关节角度差异显著更高。仅前倾骨盆倾斜位置与髂腰肌厚度和髋关节角度差异呈显著正相关。[结论] 在中立或后倾骨盆倾斜位置下蹲与髋关节角度和髂腰肌厚度变化变化无关，而在前倾骨盆倾斜位置下蹲与髂腰肌厚度和髋关节屈曲角度变化有关。我们的研究结果表明，激活髂腰肌可能是促进以髋关节为主导的下蹲所必需的。
