The Biomechanics Analysis To The Strong Forehead Topspin From The Baseline Of Our Country's Excellent Youth Tennis Athletes

Tennis sport has become a very important modern athletics item until now.In our country,tennis sport develops very quickly,the woman tennis sport has already obtained certain result especially,but the gap of level between foreign man tennis athlete and Chinese man tennis athlete is very big.Therefore,it is very meaningful to analyze the technique of our country's excellent youth man tennis athletes.The action of hitting ball with positive hand strongly which reflects the offensive capacity is one of the important techniques in tennis sport. Through the biomechanics analysis to the action of hitting ball with positive hand strongly of the tennis athletes,this article provides theoretical basis of improving technique for athletes,serves for scientific training and improving the sport results.The article deals with the action of hitting ball with positive hand strongly of our country's excellent youth man tennis athletes—Bo Yan and Chen Sa,who are the members of national youth team.The research adopts the video system of 3D and the analyzing system of human body. Through the biomechanics analysis to the action of hitting ball with positive hand strongly of the tennis athletes,we can get the conclusions as follows.First,the swinging movements of tennis athlete are not at a constant speed,there is an obvious process of adjusting and decelerating before finishing leading racket.Its purpose is for the adjustment to the action of hitting ball with racket and makes it attach to the constringency characteristics of muscle.Second,Comparing with the sport method which only has single link, the action of hitting ball with positive hand strongly of the tennis athletes nowadays inclines to constitute from several links.The elbow and wrist are concerned with forcing.It has obvious contributions to the speed of the ball.Third,in the process of the action of hitting ball with positive hand strongly,the momentum of center of human body gravity delivers from near end to far end,before the racket touching with the ball;it is match to whip action principle.But it reserves certain momentum to do preparation for a stage which the ball hitting with the racket to control the action.Forth,the action of hitting ball with positive hand strongly of modern tennis athletes takes s torso as stalk.It seems like the method of whipping and forcing.Comparing with the method of hitting ball with positive hand strongly which depends on the body level and moves extensively in the past,it can hit more high-quality ball in limited time and space.