Biomechanical Analysis Of Technical Movement Of Wang Hao And Fan Zhendong Backspin And Backhand Twist

Research purposes:This article is intended key acquisition and analysis system by Qualisys infrared light spot on Wang Hao and Fan Zhendong Pen Hold Backhand horizontal plate backhand(backspin and backhand twist)shooting motion analysis technology,to obtain the two main players:Objective kinematic parameters of technical movements.By analyzing the upper limbs,trunk kinematics characteristic analysis revealed Wang Hao and Fan Zhendong Pen-Hold Backhand backhand movement of key technical movements found their similarities and differences,providing data and technical support for future training and competition,but also for learning Penhold cross reference dozen enthusiasts.Methods:In this study,literature,expert interviews,kinematic testing and analysis,mathematical statistics for Wang Hao and Fan Zhendong pul led backhand topspin and screwed technical action research within Taiwan,mainly obtained through time parameter,spatial parameter and the joint angle data for analysis.Conclusions:1)Pull down the backhand topspin technical action period,less than the Fan Zhendong Wang Hao beat head movement time and total distance,but slight]y larger than the maximum speed of the racket head Wang Hao;both the stage and the reduct ion stage racket with more time,it accounted for a total the largest proportion of time.The maximum displacement X,Y,Z-axis direction Wang Hao seen a relatively large range of motion,hitting the range may be greater than the Fan Zhendong.2)technical action backhand twist cycle,the total time is greater than Wang Hao Fan Zhendong,from racket head movement similar to the maximum speed of less than minor Fan Zhendong;maximum displacement X,Y,Z-axis direction seen Fan Zhendong range of motion relatively large,wi thin the backhand twist forearm initiative forward long distance,compact,powerful movements;Pen-Hold Backhand Wang Hao backhand twist within the twist action structure within the station complex technology than Fan Zhendong Hengpai backhand,but it is conducive to wrist force,speed and line control the ball.3)Pull down the kinematic characteristics backhand topspin various aspects of both trunk twist angle is reduced after the first increase;Wang Hao Pen-Hold Backhand topspin backhand pulled big shoulder range of motion for the upper articulation provided more space,angle and angle changes in the value larger than the Fan Zhendong;both are the first elbow angle increases,the decrease in the reduction stage;wrist spin chain in the process of hair less affected,the difference obvious.4)backhand twist kinematic characteristics of each link is,the twist angle of the trunk of this technology has little effect;the reduced shoulder angle first increases,lift the elbow phenomenon,but both appear shoulder angle maximum time different;change the elbow angle differences are significant,Wang Hao is continuing to increase,Fan Zhendong is the first decrease and then increase;wrist joint angle change value significantly greater than Wang Hao Fan Zhendong,which is related to grip and technical play.