The Three-Dimensional Kinematic Analysis On The Last Two Strides Of Run-up And Techniques Of Take-off On Some Elite University Man Pole Vaulters In China

Analysis and diagnosis of our country part of elite male college athletes last two pole vault run-up and take-off techniques to improve our country men pole vault exercise of great significance to the overall level; colleges and universities to promote our country competitive level of athletics with the rapid development of a positive impact with the role.Selected in July 2007, held in Canton at the Eighth National University Games men's pole vault Group B match before the three players as the research object, using two Sony M 9500 high-speed cameras to photograph frequency of 100f / s, using the German SIMI-motion three-dimensional dynamic image capture system for the study of step changes in the level of the speed of change, the focus of trajectory, flight angle, trunk angle, knee angle and swing the time off to resolve a number of technical indicators, the use of Hanna Fan human mathematical model, the original low-pass filter for data smoothing, the final has to work on the parameters, and with the world's best men's pole vault athletes to compare the relevant parameters.The main findings show that: (1) study the last two steps to help long-running changes are: the penultimate step up, step by step a long countdown to the first small; but the world's best players the last two steps of the step run-up did not change significantly. (2) study the final countdown to the first step two-step run-up pedal from the ground level of an instant center of gravity of the body faster than the countdown to the second step pedal from the ground the moment decrease are not as good as the world's best players. (3) at take-off process, the research focus of the level of physical losses are greater than the speed of the world's best players; but in an instant take-off from the body center of gravity to increase the vertical speed is greater than the world best players.(4) take-off from land at the moment, the study focused on upward takeoff, leading to higher flight angle, and the world's best players is even more focused on moving the top of the take-off, which is causing a major cause of the gap score. (5) study points to take-off point is less than the distance between the forefront of fighting the world's best players; jump off at the moment, the study of trunk angle and the world's outstanding compared to larger players. (6) study to the moment at take-off from the swing knee angle, pole chord angle and grip angle is less than the world's best bad player.