A Kinematic Analysis Of The Teeing Skills Of The World's Elite Female Tennis Players

Serve is an important technology of tennis technology, serve included first serve and second serve, Serve is the main means of scoring to win the match, especially the first serve,is offensive weapons,the quality of first serve directly influences of the set of serve for player,high quality of first serve make difficult for opponent from the start,at the same time,they can score initiative by first service,and is a prerequisite to win the set of serve.In today's era of tennis serve for high speed development, the elite tennis players are showed a top speed of 251 km of ACES to show us the charm of the tennis serve.Studies of more than high-level tennis player statistics in more international matches, the results show that athletes serve an important means of attacking the game of tennis scores, tee scoring rate up 30.33% [1]. Therefore, the tennis serve research and analysis is necessary, through the study of art serve to draw some of the key features and kinematic parameters related quality serve, not only a great help to the future training of serve, but also promote the development of tennis.This study using three-dimensional video analysis method, immersive 3D virtual reality technology methods,recording the 2014 China Open tennis tournament scene of the shooting, for WTA top four singles athletes' serve technology for kinematic analysis.The results showed that:(1) Throw the ball for take action phase: Serena Williams' technology of throw the ball is relatively stable, hand ball from a height of 1.70 m, drop height of 3.13m;(2)Backward swing phase:Serena Williams and Kvitova technical action at this stage is more reasonable, "beyond equipment" action obviously, for an athlete muscle elastic energy storage. Serena Williams holds shoulder clap side, elbow angle were 112.4°and 68.5°, the lowest point of the racket head height and center of gravity height of 0.98 m and 0.99, respectively. Kvitova holds shoulder clap side, elbow angle were 108.9°and 70.1°, the lowest point of the racket head height and center of gravity height of 1.01 m and 1.02 m, respectively;(3)Swing strokes stage:Virtual reality technology to reproduce observed that Serena Williams and Kvitova of technical movements more reasonable. Through the service action in the three stages of analysis,studies suggest that Serena Williams' first serve technology meet the technical operation principle,and is valuable technical action model.This study aimed at WTA top four singles athletes' serve technology for kinematic analysis,to analysis kinematics of throw the ball for take action phase,backward swing phase and swing strokes stage,and to find out some regular patterns and features,find their common characteristics and demonstrate the principles of tennis serve kinematics,designed to provide an accurate reference for future training of tennis players.