Kinematical Analysis Of Taekwondo 's Backward Kick

Taekwondo back kick technique in the game is a typical turn defensivecounterattack， which has strong concealment， fast speed， the lethality amazing，but after the roundhouse kick technical difficulty， requires players to rotate360degrees in place，so in the game use frequency is not very big，but not as aggressivekicks use. Only athletes master spinning back kick technique， can use in the game，to win the game.This paper uses the method of3D imaging，spin on the four Taekwondo athletesplaying for biomechanical analysis technique， so as to obtain spinning back kicktechnique of time， joint angle， joint velocity， gravity， displacement variationof motion data， from which deeply reveals the spinning back kick technique action，provide theory reference for spinning back kick technique practice.Through the analysis of the results， draw the following conclusions:1from the time characteristic analysis， integrated action time was1.365±0.065s，0.265±0.044s and turning stage， after the turn to the knee stage is0.224±0.026s，tic out swinging on stage is0.361±0.221s，hit after the reduction stage is0.547±0.107s.2from the official to make changes， the hip angle changes directly affect thefinal attack foot hits the effect of hip joint， always leading in the knee and anklejoint， knee joint changes from the point of view， the knee more small actioncompletion time is shorter. By reducing movement radius to improve the speed ofaction.The3leg joints from the attack speed of4participants of the hip joint in two wavecrests. The first peak appeared in turn after sports， athletes rely on hip rotation tocomplete the starting stage， the second peak appeared before the kick out swingbeat， athletes using hip sudden acceleration maximum speed to increase momentum.Then to the knee and ankle joints of hip， knee point transfer speed of change as"small in" in the ankle joint in that instant hit the target before， instead of hitting thetarget. 4from the rotary body centre of gravity displacement playing the wholemovement of the center of gravity of the body displacement of athletes athletes bodyweight is moving forward and moving up and down， but don’t move around much.Because of the movement characteristics of spinning back kick， so the body stabilityto athletes in training. The balance of the body ability strengthening exercises. Aboutthe fluctuation to narrow as far as possible， the only way to complete spinning backkick.