Kinematics Analysis On Run-up And Take-Off Technique Of The 12th National Games Men's High Jump Athletes

The sport in the high jump in the human history has a long history, as early as in the high jump about can be traced back to around 1700 AD, in the history of the development of the long human history, since the high jump the sport because of its itself is interesting, technical, contests, always constantly perfect development, until the high jump in the United States in 1864 is listed as a formal track and field events. As in the same year, the British Robert KeJi adopt leapfrog created 1.70 m high jump record for the first time, the ancient high jump movement also withdrew from the historical stage.With the continuous development of the high jump movement, more and more of the coaches and athletes in constantly breakthrough new height, also on a technical innovation. Since high jump become formal track and field events, its technology has experienced a leap, shearing, rolling type, stomach, and is generally used to carry on the back.Mainly depends on the advantages of fosbury style high jump linear joint arc run-up, can not only guarantee the horizontal velocity of the body, and the formation of the natural, within a reasonable Angle when the takeoff of the leaps Angle, thereby helping to takeoff effect. So, several links in fosbury flop, run-up and take-off technology, as well as the connecting link of approach and takeoff technology, is particularly important. This study through the literature material law, video shooting method, analytical method, mathematical statistics, etc., with seven before the national games men's high jump athletes as the research object, the key research analyses the run-up rhythm, run-up transition stage and takeoff stage, the relevant kinematics parameter, find out the deficiency, the action for the development of high jump in China provide certain technical support and reference. By the analysis and research, the results are as follows:1. Thin high jump athletes body shape in our country, this paper selected 7 players an average of 375 grams of Mr Index, and excellent high jumper Mr Index interval value gap is larger.2. Through the video and watch the game repeatedly found that the stand or fall of high performance, and run-up rhythm has much to do, but in actual, combining with the characteristics of its own technology and every player has a set of suitable run-up rhythm. Reasonable run-up rhythm is the basis of maximizing the high jump athletes training level.3. Level of run-up speed, is the penultimate step the fastest wang yu, 7.58 m/s, the slowest is taken stone lock, to 7.13 m/s. Chinese athletes run-up last step body centre of gravity is the horizontal velocity is lower than the world elite athletes, and the loss ratio of velocity is higher, to the level of run-up speed utilization needs to be improved, restraining it to the final grade.4. In terms of utilization rate of horizontal velocity, Sun Zhao, deng, taken stone lock speed utilization ratio is relatively high,68.88%,69.36% and 68.88% respectively, but due to the low level at the end of the run-up speed, so eventually the vertical velocity is not high, in the form of the first wang yu speed utilization ratio of 66.43%, from 72.71% of the second white dragon is still some way to explain wang yu in speed and larger mining and improve space utilization, while the white dragon after the need to focus on improving leaps the lever action, in order to better use speed at first.5. In terms of curve run-up body center of gravity height, white dragon, deng, taken three stone lock bottom first step in the centre of gravity height than the penultimate step of center of gravity height was increased, which it stone lock up 0.16 m. And coherent view is volatile, for maintaining and jump run-up speed of energy conversion have produced some negative effects.6. Curving approach the last step in the body of the point of view, for gentle nature to reduce the human body center of gravity, as well as increasing the takeoff Angle has important significance. Wang yu, wangchen, Sun Zhao three people pour 2 step Angle than 3 step up more than 10 degrees, shows that the speed of the athletes in the 2 step still continues to grow and does not decrease, while the white dragon and Sun Zhao phenomenon appeared in Angle smaller.7. Seven selected in this paper the research object, the take-off leg touchdown moment of despair of a seed with an average of 54.85 degrees, the maximum is 57.13 degrees qianhong, minimum Sun Zhao 52.74 degrees, of which the first wang yu was 55.98 degrees, the seed size, step by step, and the last long on the reasonable seed help braking effect of guarantee and takeoff leg stretching.8. This study selected athletes during takeoff buffer largest knee joint Angle with an average of 139.07 degrees minimum maximum 141.73 degrees 135.89 degrees. Therefore, buffering moments knee joint Angle smaller overall, should strengthen the training of the lower limb strength, improve the supporting ability of athletes.9. This article selected seven research object, the jumper at pedal from the ground instantly, hip, knee, ankle, respectively, the average of the three joint Angle of 167.15 degrees,163.47 degrees,163.23 degrees, wangchen ankle Angle of 173.22 degrees, to explain the ankle joint strength is larger, joints, good stretch, but hip strength relatively weak, so, should focus on increasing the power of the hip joint.10. This paper selected the seven athletes, in swinging leg stretching in phase, the average maximum acceleration swinging leg knee and ankle joints are respectively 517.6°and 853.5°s/s, wang yu of the knee and ankle joint angular velocity is the fastest,594.6°and 1002.4°s/s, illustrates its most positive swing.11. Wang yu in swing arm technology, the first name of the swing arm, the fastest speed 7.55 m/s, two arms and Sun Zhao speed 7.21 m/s, so, in view of the athletes swing arm slower, upper body strength training should be paid attention to in daily training, improve the speed of swing arm, and thus drive the body make up better.