Biomechanics and Sports Research Unit, Faculty of Physical Therapy, Mahidol University , Salaya, Thailand.
Allied Health Research Unit, University of Central Lancashire , Preston, UK.
Sports Biomech. 2020 Oct;19(5):652-664. doi: 10.1080/14763141.2018.1510024. Epub 2018 Oct 2.
Knee joint coordination during jump landing in different directions is an important consideration for injury prevention. The aim of the current study was to investigate knee and hip kinematics on the non-dominant and dominant limbs during landing. A total of 19 female volleyball athletes performed single-leg jump-landing tests in four directions; forward (0°), diagonal (30° and 60°) and lateral (90°) directions. Kinematic and ground reaction force data were collected using a 10-camera Vicon system and an AMTI force plate. Knee and hip joint angles, and knee angular velocities were calculated using a lower extremity model in Visual3D. A two factor repeated measures ANOVA was performed to explore limb dominance and jump direction. Significant differences were seen between the jump directions for; angular velocity at initial contact ( < 0.001), angular velocity at peak vertical ground reaction force ( < 0.001), and knee flexion excursion ( = 0.016). Knee coordination was observed to be poorer in the early phase of velocity-angle plot during landing in lateral direction compared to forward and diagonal directions. The non-dominant limb seemed to have better coordination than the dominant limb during multi-direction jump landing. Therefore, dominant limbs appear to be at a higher injury risk than non-dominant limbs.
不同方向跳跃落地时膝关节协调是预防损伤的重要考虑因素。本研究旨在探讨非优势侧和优势侧肢体在落地时的膝关节和髋关节运动学。19 名女性排球运动员分别进行了前向（0°）、斜向（30°和 60°）和侧向（90°）四个方向的单腿跳跃落地测试。使用 10 台摄像机 Vicon 系统和 AMTI 力板采集运动学和地面反作用力数据。使用 Visual3D 中的下肢模型计算膝关节和髋关节角度以及膝关节角速度。采用双因素重复测量方差分析探讨肢体优势和跳跃方向的影响。跳跃方向之间在初始接触时的角速度（<0.001）、峰值垂直地面反作用力时的角速度（<0.001）和膝关节屈曲幅度（=0.016）方面存在显著差异。与前向和斜向相比，侧向跳跃落地时在速度-角度图的早期阶段膝关节协调较差。在多向跳跃落地时，非优势侧肢体的协调性似乎优于优势侧肢体。因此，优势侧肢体比非优势侧肢体更容易受伤。
