a Department of Kinesiology , Shenyang Sport University , Shenyang , People's Republic of China.
b Li Ning Sports Science Research Center , Beijing , People's Republic of China.
Eur J Sport Sci. 2019 May;19(4):471-479. doi: 10.1080/17461391.2018.1534993. Epub 2018 Oct 26.
Table tennis players often execute one-step, side-step or cross-step to move to an appropriate position for topspin forehand. However, to our knowledge, no studies have investigated the footwork effects on lower-limb kinetics and kinematics, which are related to playing performance and injury prevention. This study examined the ground reaction forces, joint kinetics and in-shoe plantar pressure distribution during topspin forehand with three typical footwork patterns. Fifteen male table tennis players performed cross-court topspin forehands in one-step, side-step and cross-step. Force plate, motion capturing, and instrumented insole systems were used to measure ground reaction force, joint moments and plantar pressure variables. One-way ANONA with repeated measures was performed to determine any significant differences between footwork. Results indicated that participants exhibited significantly higher ground reaction force loadings, knee flexion angle, knee moment, ankle inversion and moment during side-step and cross-step compared with one-step footwork condition (p < .01). Plantar pressure data indicated that the significantly higher peak pressure were observed in the total foot, toe, 1st, 2nd and 5th metatarsal regions during side-step and cross-step (p < .01). Additionally, cross-step had induced higher peak pressure in medial midfoot and heel regions than one-step and higher peak pressure in total and 1st metatarsal regions than side-step (p < .01). These results suggest that foot orthotic designs should consider the stronger emphasis on those high-pressured areas and that the differential joint and plantar loadings in side-step and cross-step may provide useful insights to injury mechanism and training protocol development.
乒乓球运动员通常会执行一步、侧步或交叉步来移动到适合正手攻球的位置。然而，据我们所知，目前还没有研究调查脚步动作对下肢动力学和运动学的影响，而这些因素与运动表现和预防受伤有关。本研究通过三种典型的脚步动作模式，研究了正手攻球时地面反作用力、关节动力学和鞋内足底压力分布。15 名男性乒乓球运动员进行了一步、侧步和交叉步的正手攻球。使用测力板、运动捕捉和足底压力感应鞋垫系统来测量地面反作用力、关节力矩和足底压力变量。采用单向方差分析（ANONA）和重复测量来确定脚步动作之间是否存在显著差异。结果表明，与一步脚步动作相比，侧步和交叉步时参与者的地面反作用力负荷、膝关节屈曲角度、膝关节力矩、踝关节内翻和力矩显著增加（p < .01）。足底压力数据表明，侧步和交叉步时总脚、脚趾、第一、第二和第五跖骨区域的峰值压力显著升高（p < .01）。此外，交叉步时中足内侧和脚跟区域的峰值压力高于一步，总脚和第一跖骨区域的峰值压力高于侧步（p < .01）。这些结果表明，足矫形器设计应考虑到这些高压力区域，并应考虑到侧步和交叉步时关节和足底负荷的差异，这可能为受伤机制和训练方案的制定提供有用的见解。
