The Kinematic Analysis Of Bend Run Techniques Of The Indoor Standard 200meters Track Field

When running the 200meters sprint in the indoor standard track field, bend run techniques is an important factor that influences the scores. Indoor Track and Field Championships is held between January to march months every year . Winter is an adjustment period of the athletes , researching the indoor standard track field can not only shorten the training period of adjustment of the sprinters, but also can offer some the oretical knowledge to the 200 meters techniques outdoors.The research was make in the indoor standard 200meter track field in the Shenyang sport university, July 22nd, 2010, 9:00 AM, and the temperature then was 27°C,using two synchronous cameras, recording the situations of the 12 second grade sprinters who are the students in Shenyang sport university that involved in testing. This paper uses Literature consultation, Questionnaire method ,video recording, three dimensional kinematic, Mathematical Statistics, comparative analysis and other methods to analyze this matter.The writer mainly analyze the kinematic analysis of bend run techniques in the indoor standard 200meters track field, the influence to scores that result from the speed of gravity of step length and step frequency, body tilt inward, the support and take-off time of one double-step and track number during the bend run, the extension velocity of the two side hips, the angle change of foot, ankle , knee between the swing leg and supporting leg in the three phases of support, the angle change between the two arms and body and the angle change between the two thighs in the moment the after driving leg action just finished and other aspects. The result is that compared to excellent athletes who are in China, the athletes of Shenyang sport university have some shortcomings in the bend run techniques.In the indoor standard 200mters bend running, to the 12 second grade sprinters who are the students in Shenyang sport university, the length of step should be increased when the track is outside. The speed which focus moves should be increased .The range of up and down should be small .With the track radius increases, the greater the inclination of the body inward. .In the process of supporting , the moment of supporting ,the angle of ankle is big, at the same time , the angle between foot and ground is small . And the hip should be positive. During the pawing movement, the angel of knee should be increase properly, the ankle dorsiflexion should be reduced properly and the angle between foot and ground should increase accordingly. In the after driving leg action, the angle between right arm and body is bigger than the angle between left arm and body , and the angle between legs should be increased and so on . Overall, the 12 second grade sprinters who are the students in Shenyang sport university all need to improve their techniques in the indoor 200meter bend run.Hence, the coaches should pay much attention on the improvement of the bend run techniques of the sprinters.And to the details of the indoor standard 200meters bend run techniques; the coaches should increase the quality of the bend run techniques trains, to achieve the perfection of the human-bend run on the techniques selectively.