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The Kinematics Analysis on Technology of Our Excellent Women Jumper during the Take-off and Transit

Author: LiZuo
Tutor: LiJianYing
School: Shanxi University
Course: Physical Education and Training
Keywords: Female high jump Takes off the technology Soars the technology Kinematic analysis
CLC: G823.1
Type: Master's thesis
Year: 2009
Downloads: 63
Quote: 0
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Abstract

High jump which took an athletics movement project, was apart from already has more than 100 years history now. In 1957, Chinese female high-jumper utilized type high jump technology record cuts to break the world record by 1.77 meters result, which has shocked the sports world of the world. More and more events achieve the top in the world with the continuous advancing of athletic level in China. But high-jump is so wandering which was preponderant that it has declined to the worst situation, and loses the top position in Asia. Based on the kinematic parameters of take-off and transit in the process of quantitative analysis for the Chinese elite female athletes in the high jump to examine the kinematic characteristics of take-off and vacated in the high jump of the Chinese elite female jumpers, which for the training to provide some data available in the future.In this research, take part in selection in 2007 National Track and Field Grand Prix Final women flop before the five athletes as the research object, both at 1.80m above grade, using the literature material law, the movie photography law, the image analysis law, the mathematical method of average to analysis the object which studies the technology of take-off and transit in the high jump. The analysis of this research will be made transit for quantitative contact with the take-off together, for the individual of the technical characteristics of our athletes to find out the flaw which our country athlete technical aspects, and proposed the corresponding solution measure, urges the technology to achieve the optimal training.The study found that Chinese high jumper has the characteristics of speed, it is consistent with the development trend of the high jump, but there are also have much lack at the same time. The research results are as follows:1.At the take-off stage, the angle of knee joint of the take-off leg has been small, resulting in a buffer range of small, so that is not conducive to the level of kinetic energy into a very good elastic potential energy of the take-off leg extensor , and not conducive to the rapid phase of leg extensor strength. It is very obvious that Chinese athletes’ range of tread and stretch is spatial difference with the world’s best players in the moment of take-off from the ground.Therefore,we should pay attention to strengthen the muscle power of the take-off leg, and need take more practice to improve joint power and pliant in the training.2. At take-off process, the athletes of the swing range of the swinging leg is better, that began from the moment of the swinging leg from swinging to the moment between take off the legs off and stick out hipbone, there is still a certain extent before the swing. But swing speed less, which would restrict swing the braking effect. Swing arm also exist the same problem. We should pay special attention to the swinging leg and upper extremity strength training and a positive sense of lying on, strengthening the legs swing arm coordination.3. Run-up level of the speed of our athletes are better than the world’s best players, regardless of the leg at the moment of take-off or from the body center of gravity of the horizontal velocity are larger, However, to the moment at take-off from the vertical velocity is far below the world level, it is description that Chinese athletes at the speed of take-off stage of the conversion rate lower.4. Because of the effect of leg extensor when the end of our athletes take-off, so at the beginning of take-off, the physical center of gravity low, but the instant center of gravity of the body height and take-off leg working distance are less than the world best players, at the end of take-off. Coupled with the level of take-off at the speed of a larger burden, it be will increase the take-off leg, the result that the impact of take-off effects.5. This article is tried the pedal to extend the time is longer, but the pedal extends the scope to be small, explained that the pedal extends the speed to be slow, that will affect stores up originally in takes off in leg’s elastic potential energy to take off in the process display.6. Is soaring the stage, this article is tried the bodily pole to grasp well in turn in turn. But has soared the pole stage body center of gravity not in the cross rod place above, that to a certain extent has wasted the H2 value use factor, and leaps the angle to be somewhat low and the bodily center of gravity pole angle to be bigger, will reduce H2 the altitude. It may through have the hop, the bodily center of gravity pole included angle and leaps the angle to improve leaps highly and the pole technology.

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