The agile footwork is a basic but important skill, how to efficiently grasp and improve its performance has always interested coaches and athletes, beginners particularly. The purpose of this study was to investigate the differences in kinetics and kinematics of the cross step between professional athletes and novice athletes using the Oxford foot model. Twenty-two male participants (professional athletes, 11; novice athletes, 11) with dominant right feet participated in the table tennis cross step test. A Vicon motion analysis system and a Novel Pedar insole plantar pressure measurement system were used to record kinematic and kinetic data, respectively. Professional athletes showed significantly smaller forefoot plantarflexion and abduction, but larger hallux dorsiflexion at the cross step ending. In addition, they also showed significantly larger forefoot dorsiflexion and adduction but smaller forefoot eversion as well as rearfoot inversion than novice athletes at the forward-end of the step. In the entire motion, professional athletes performed significantly smaller joints range of motion, especially the hindfoot with respect to tibia angles. Concerning plantar relative load, professional athletes were significantly greater than that of novice athletes in the other toes, lateral forefoot and rear foot. Professional athletes possessed higher footwork agility and greater foot motor technique. The findings on the internal mechanisms of the cross step could help coaches and novice athletes understand the mechanical efficiencies in stroke finishing leading to improvements in performance.

中文翻译：

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乒乓球跨步动作下肢力学特性

敏捷步法是一项基本但重要的技能，如何有效地掌握和提高其表现一直是教练员和运动员特别是初学者感兴趣的。本研究的目的是使用牛津足部模型研究专业运动员和新手运动员在交叉步的动力学和运动学上的差异。22名具有优势右脚的男性参与者（专业运动员，11；新手运动员，11）参加了乒乓球跨步测试。Vicon运动分析系统和Novel Pedar鞋垫足底压力测量系统分别用于记录运动学和动力学数据。职业运动员表现出明显较小的前足跖屈和外展，但在交叉步结束时拇趾背屈较大。此外，与新手运动员相比，他们还表现出明显更大的前足背屈和内收，但前足外翻和后足内翻更小。在整个动作中，职业运动员的关节活动范围明显较小，尤其是后足的胫骨角度。在足底相对负荷方面，专业运动员的其他脚趾、前足外侧和后足的足底相对负荷显着大于新手。职业运动员拥有更高的步法敏捷度和更好的足部运动技术。关于跨步内部机制的发现可以帮助教练员和新手运动员了解击球完成的机械效率，从而提高成绩。