Kinematic Analysis Of Straddle Jump To Push Up Of Difficulty Elements Of Sports Aerobics

Along with the increasing development of competitive acrobatic gymnastics. People request more difficult to the athlete skill and action. From picked straddle jump to turns around 360°and picked straddle jumping into front support, then to the difficulty combination, the difficulty is greater and greater. At major competition, picked straddle jumping into front support is used frequently because of its'high score. When gymnasts take part in the classify competition in Shanghai University of Sport, it becames into a general diffcult movment. but the quality of students'completion is not optimistic.Therefore, in order to improving our teaching method, helping students understanding picked straddle jumping into front support more profound, it's necessary to research this movement.This paper uses the literature material law, the interview law, the method of inspection, the video recording analysis law, the mathematical method of average, we analysis picked straddle jumping into front support from the movement biology mechanics angle.The main efforts of this paper through the experiment follow: 1. The stage of taking off from the ground, the athlete center of gravity highly with altitude being suitable, takes off when contrasts the movement the hip, the knee, the malleolus joint angle is smaller than the standard movement, under the torso anteversion presses, the bodily center of gravity is somewhat low..2. The stage of soaring, the contrast movement center of gravity soars highly and high the standard movement is higher than, and when soars high rapid and the leg3. Instantaneous of uniting legs, the contrast movement two leg included angle is smaller than the standard movement, and the leg angular speed is slow, the coxa angle is big, the knee, the malleolus joint angle is small.Namely soars when the upper body positive under has not pressed, the lower limb muscle relaxes.4.When unit legs completely, the contrast movement center of gravity is highly higher than the standard movement, the standard movement four limbs also fall to the ground, contrast movement body and ground included angle oversized, the both feet falls to the ground first.5.The time distributes, the standard movement taking off time is long, and the leg speed is quick, and the leg completes the time to be short; The contrast movement taking off time is short, and the leg speed is quick, and the leg completes the time to be long.