Yang Ya Red Vault Cartwheel Somersault Twist Straight Side Of The Body 630 ¡ã Kinematic Analysis

The article reveals the rule of motions and still features of the 360°movement by the National Vaulting House champion Yang Yahong. Through the methods of documenting, observating, interviewing as well as the reaching in 3 dimensional videotapeand analysis, which has provided the oretical evidence and refering skill data for the development and improvement on such significance for the promotion of our national women voulting house atheletes to break the record in the 2008 Olympic Games.The whole motion of the vailting house is consist of seven parts. And any dissertation is focus only on five sections, they are hitting the take-off board, first flight, pushing hards, secong flight and landing. According to the research, the 3times side hard changing into the straight body reverse in 630°dimension were all successful, supporting by the following five conclusions:â'ˆOn hitting the take-off board, her feet were cast on the front of the center of gravity, forming an angle of 65°. After the buffering the hitting was fast and strong, while the hitting time was only 0.88 seconds. She has already turning to the right while lefting the board, forming an angle of about 79°.â'‰While in the process of rising, her left hand was actively touching the house and kept on turning, accelerating swinging the legs. The time between takeing-off and her first flight only take 0.10seconds.â'ŠShe extend the angle between the shoulder, the elbow and kept the gesture of handstand. At the same time, her two legs kept on swinging, forming an angle of about 78°in the position of handstand by only one arm.â'‹The highest point of her second flight was about 2.58 from the ground, with the time of around 0.98 seconds. She immerdiately began to turn left after her right hand off the house. The main impetus of the turning was the movement by the head and the shoulder. Her speed was changed into 15.07rad/s after a 630°turning, with the changing angle of 8.56rad/s. The main contradiction of her second flight is solving the speed while turning.â'ŒThe stretch and the exact turning are the premise of a good landing. While landing one must seize the opportunity and the angle. Her angle was about 63°while landing the angle of the kneel and ankle should be stretch for it canextend the cushion time and reduce the pressure.