Solomonow-Avnon Deborah, Wolf Alon, Herman Amir, Rozen Nimrod, Haim Amir
Biorobotics and Biomechanics Lab (BRML), Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, 32000, Haifa, Israel.
J Orthop Res. 2015 Feb;33(2):261-9. doi: 10.1002/jor.22744. Epub 2014 Sep 25.
Footwear-generated biomechanical manipulation of lower-limb joints has been shown to influence lower-limb biomechanics. Numerous studies report the influence of such interventions on the knee, however little is known about the influence of these interventions on the hip. The present study analyzed kinetic and kinematic changes about the hip of 12 healthy young males who underwent biomechanical manipulation utilizing the APOS biomechanical device (APOS-Medical and Sports Technologies Ltd., Herzliya, Israel) allowing controlled foot center of pressure manipulation. Subjects underwent gait testing in four para-sagittal device configurations: Medial, lateral, neutral, and regular shoes. In the medial configuration, subjects demonstrated no change in step width (i.e., distance between right and left foot center of pressure), however inter-malleolar distance significantly increased. Likewise with the medial setting, greater hip abduction was recorded, while hip adduction moment and joint reaction force decreased significantly. We speculate that subjects adopt a modified gait pattern aimed to maintain constant base of support. As a result, hip abductor muscle moment arm increases and adduction moment and joint reaction force decreases. To the best of our knowledge this is the first study to show this relationship. These results contribute to the understanding of lower-limb biomechanics and warrant further investigation.
鞋类对下肢关节产生的生物力学操控已被证明会影响下肢生物力学。众多研究报告了此类干预对膝关节的影响，然而对于这些干预对髋关节的影响却知之甚少。本研究分析了12名健康年轻男性在使用APOS生物力学装置（APOS医疗与运动技术有限公司，以色列赫兹利亚）进行生物力学操控时髋关节的动力学和运动学变化，该装置可实现对足底压力中心的可控操控。受试者在四种矢状旁位装置配置下进行步态测试：内侧、外侧、中立和常规鞋。在内侧配置下，受试者的步幅（即左右足底压力中心之间的距离）没有变化，但内踝间距显著增加。同样在内侧设置下，记录到更大的髋关节外展，而髋关节内收力矩和关节反应力显著降低。我们推测受试者采用了一种改良的步态模式，旨在维持恒定的支撑基础。结果，髋关节外展肌的力臂增加，内收力矩和关节反应力降低。据我们所知，这是第一项展示这种关系研究。这些结果有助于对下肢生物力学的理解，并值得进一步研究。
