| Objective:technical action both off an action to complete the foundation, which determines the use of movement and action to complete the technical quality, so off technique even more critical. This study fund projects in Jiangsu Province-" trampoline mesh optimization features and jump action research " part of the subject, I refer to the findings of many scholars, the Internet’s technical movements into the net off stage, kicking stage, and net stage, with the national elite athletes for the study, these three stages athlete body kinematic parameters were analyzed, designed to explore the athletes off-line technical action of central tendency of each kinematic parameters provide a theoretical reference for athletes training and provides data to the main topic modeling purposes; through analysis and study of the action of Lu Chunlong mistakes, mistakes investigate its causes action, adjust its technical movements provide a reference.Methods:The main use of literature, video resolution, mathematical statistics, comparative analysis of the national championship of men’s trampoline athletes in the top eight technical operation of off-line analysis and research, organize their technical movements of the knee, hip joint, shoulder angle and the angle of the net, off-grid angle, focus speed, pressure and depth data network of central tendencyResults:(1) Trampoline off technology networks with network instant major joints of the body including the trunk, knee, hip, shoulder to maintain a certain bent posture, to the moment kicking knee, hip, shoulder angle remained unchanged throughout the body maintain a certain rigidity. Suitable techniques should be when the net moment of the knee toe catenary, hip, shoulder to maintain a certain angle, the angle at 87.20 network°±1.360° network, the focus quickly adjust to just above the anchor, the formation of high-speed, straight down the " impact" network technology.(2) From the moment kicking started, the body joint angle "explosive " increase in net when pressed close to the lowest point of 180°, human muscle acting to become a key player thrown altitude; pressure when kicking the end of the lowest point of the network substantially upright posture, the swing arms positive, active elevation trunk, knee, hip, shoulder angles are "explosive " increase" kicking straight state close to the lower extremities. Showing the technical features of "explosive" kicking off the network(3) from the body motion characteristics of network stages:the pre-swing arm forward posture, muscle tension, Hanxiong round back, hip, knee and ankle are in a kicking pose, knee, hip angle tends to be the biggest, shoulder joint angle decreases, the swing arm forward and pushing the body forward somersault, lower extremity joints to maintain a certain rigidity, the use of mesh elastic potential savings can make the body "passive" up.(4) Lu Chunlong failure occurs because the operation of the network for the gravity center position coordinates (2.136,1.160,0.748), and the success of the action position coordinate of the center of gravity (1.051,1.897,0.742), x-axis direction be offset; kicking stage, two knee angle difference is large, legs kicking force imbalance, resulting in a greater level of speed, resulting in vertical take-off speed is reduced, the focus ascent decline, it is difficult to complete the action; hauling stages over the Internet early swivel force, the horizontal velocity increases again, leading to drastic horizontal displacement of the center of gravity, the action only after the complete fall of the edge of the network, causing the action to fail. Therefore, legs kicking net force is not balanced, twist force is a major factor in premature failure of its action. |
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