Hasegawa Masaki, Chin Takaaki, Oki Sadaaki, Kanai Shusaku, Shimatani Koji, Shimada Tomoaki
Department of Physical Therapy, Faculty of Health and Welfare, Prefectural University of Hiroshima, 1-1 Gakuen-cho, Mihara City, Hiroshima 723-0053, Japan.
Department of Rehabilitation Science, Kobe University Graduate School of Medicine, 7-10-2 Tomogaoka, Suma-ku, Kobe City, Hyogo 654-0142, Japan.
Sports Med Arthrosc Rehabil Ther Technol. 2010 Jun 11;2:14. doi: 10.1186/1758-2555-2-14.
The aim of this study was to investigate the kinetic characteristics of compensatory backward descending movement performed by patients with osteoarthritis of the knee.
Using a three-dimensional motion analysis system, we investigated lower extremity joint angles, joint moments, joint force of the support leg in forward and backward descending movements on stairs, and joint force of the leading leg at landing in 7 female patients with osteoarthritis of the knee.
Compared with the forward descending movement, knee joint angle, joint moment and joint force of the support leg all decreased in the backward descending movement. Joint force of the leading leg at landing was also reduced in the backward descending movement. In addition, we confirmed that the center of body mass was mainly controlled by the knee and ankle joints in the forward descending movement, and by the hip joint in the backward descending movement.
Since it has been reported that knee flexion angle and extensor muscle strength are decreased in patients with osteoarthritis of the knee, we believe that backward descending movement is an effective method to use the hip joint to compensate for these functional defects. In addition, due to the decreased knee joint force both in the leading and support legs in backward descending movement, the effectiveness of compensatory motion for pain control and knee joint protection was also suggested.
本研究旨在探究膝关节骨关节炎患者进行代偿性向后下楼梯运动的动力学特征。
我们使用三维运动分析系统,对7名膝关节骨关节炎女性患者在下楼梯时向前和向后下楼梯运动中支撑腿的下肢关节角度、关节力矩、关节力以及着地时前导腿的关节力进行了研究。
与向前下楼梯运动相比,向后下楼梯运动中支撑腿的膝关节角度、关节力矩和关节力均降低。向后下楼梯运动中着地时前导腿的关节力也降低。此外,我们证实,向前下楼梯运动中身体重心主要由膝关节和踝关节控制,而向后下楼梯运动中则由髋关节控制。
鉴于已有报道称膝关节骨关节炎患者的膝关节屈曲角度和伸肌力量会降低,我们认为向后下楼梯运动是一种利用髋关节来代偿这些功能缺陷的有效方法。此外,由于向后下楼梯运动中前导腿和支撑腿的膝关节力均降低,这也提示了代偿运动在控制疼痛和保护膝关节方面的有效性。