Kinematics Analysis of the Elite Speed Skaters in a Stroke during the Straights of Speed Skating

The two excellent athletes' speed skating data are obtained and kinematically analyzed by using the three-dimensional DLT video camera.The result shows that if the athlete's slide time is too long,it will reduce the frequency of skating.It is not obvious that thigh drives shank.If the athlete strengthens the stretching range of the hip joint during the single support,it will help to strengthen muscle force and improve the effect of pedaling ice.Meanwhile,if the stretching range of the knee joint is too little in the course of side support pedaling,it will cause passive influence to skating.Bigger knee angle in freedom slippery stage will increase the scope of knee joint flex when the athlete begins to skate,which will do much harm to the performance.