Kinemics Research On The Switcher Techniques During The Take Off Course On Excellence Man Long Jump Athletes In China

Take-off is the key technique in long jump. Take-off must been effectively finished through the active cooperation between the cushion, 'pedaling and stretching' of the take-off leg and swing of the leg, so it is a complex technique. The take-off system consists of the cushion, 'pedaling and stretching' of the take-off leg and swing of the leg, especially the swing technique. The swing technique plays an important pole in this course. According to some concerned researches show that the swing power is approximately 60-70% in all take-off power. With the swing velocity being bigger, you may increase the take-off power and improve the take-off effect. From all above these, swing technique is one of the effective ways in long jump. The article explores the kinematic characters of swing technique from the elite men long jumpers through the qualitative and quantitative analysis. This research will find the breakthrough between the teaching and training in long jump in order to actualize the optimal compounding of take-off technique. This will provide a theoretic reference to the men long jumpers in our country.The article selects the top eight as objects in National championship or Olympic trial men long jump finals hold in Shijiazhuang on May 20, 2004. It applies literature review, investigation and visit method, film screen method, image analysis and mathematical statistics method. The results show that:1. The angle velocity of the swing arrive at 7.4.378 + 78.563° /s in cushion. It is a vital factor between the branch of vertical velocity, the initial velocity of flight and achievement in long jump.2. The swing velocity and vary of angle between the two thigh directly...