| Javelin movement has a long history in the javelin development process, its world records are constantly being refreshed. At present, the overall level of China’s javelin world far behind. Through books, literature review, research found that finally forced technology javelin thrower more, and have put forward different views and opinions, provide a detailed theoretical basis for the different levels of training javelin thrower. However, due to long-term exercise training is a continuous process, but also between individual athletes obvious differences, so the elite athletes training and research can not point to a theory just. In this paper, literature, expert interviews, follow-up observations, high-speed camera law (German production company SIMI SIMI°motion 7.0 three-dimensional motion video analysis system for young athletes Suzhu Qing for a period of one year and a half of tracking and monitoring and research on monitoring Suzhu Qing during three different time periods throughout the throwing conducted a field point shooting and image analysis, which includes 12 dimensional coordinate frame calibration point and shoot three frequency 100fp/s cameras), video recording analysis and mathematical statistics, logical reasoning and other research methods, the different stages of the last exertion elect more intuitive dynamics related indicators at right angles Tuixi changes torso angle changes after throwing arm right shoulder and right elbow angle angle change, the left leg knee angle changes in the level of speed changes the center of gravity, the speed of change and the javelin whipped links to the maximum acceleration instantaneous acceleration changes link on Suzhu Qing finally forcibly phase tracking individualized diagnosis and kinetic analysis, the individual Thrower in the technical parameters, and timely feedback to the coaches to modify training content, on the one hand Suzhu Qing occur at different times conduct training issues; the other longitudinal comparative analysis of their sample data, for future coaches in the development of the athletes ’individual’ training program changing training methods, content and improve the scientific degree provide specific quantitative targets, so that athletes throwing technique has been further developed and improved.For Suzhu Qing three "individual", the results show that, as a young javelin throwers its technology does not form their own style, poor quality of the action is completed, but after every action to complete the research and feedback Suzhu Qing rationality have improved:Analysis results for the first time:the ability to work the right leg after the ground is poor, but the buffer is relatively reasonable force poor posture; back torso tilt is too large and can not maintain a stable backward amplitude, resulting in upper limb advance force, left leg landing Slow; throwing arm force in advance, range of motion changes unreasonable; left leg landing posture is poor, can not form a solid brake support, but left leg kicking active force posture is good; "whipping force" in the wrong order, advance force serious, there is no complete convergence of the upper and lower part of the action; javelin reach maximum acceleration when the upper part of the state is still in the acceleration, braking did not produce a valid result in the loss of momentum is too large; the focus speed remains poor, run-up and finally forced convergence bad.The second study analysis:right leg after landing magnitude larger buffer, but kicking force posture is more reasonable; after dumping margin is too large trunk, but right foot forward To the left the ground instantly able to maintain a relatively stable after dumping margin; throwing arm force still appeared earlier, but relatively throwing arm lead more stable gun; left leg landing posture is still poor, can not form a solid brake support, and left leg kicking a reasonable degree of force is also reduced; "whipped hard" less effective, throwing arm and torso force convergence of unreasonable force, elbow velocity peak too early, but with the data in a "whipping force" Compared improved; javelin reach maximum acceleration at the upper part of the acceleration at a reasonable interval; the focus of the final step in the right leg speed when the ground is relatively low, but the ability to take advantage of the speed is good.A third study analysis:right leg after landing buffer margin is still too large, kicking reasonable force posture; torso after dumping margin is too large, but the right foot forward to left feet touch the ground after dumping margin is more stable; throwing arm shoulder angle to maintain a relatively stable stance, left foot forward to reasonable changes before elbow angle still appeared to pull a gun gesture in advance; left leg with a reasonable attitude, brake support more stable, to Javelin Throw When kicking attitude is good; for "whipping force" understanding remains unclear, throwing arm whipped order more reasonable, but still link up with the torso whipped unreasonable; javelin reach maximum acceleration at the upper part of the right wrist appeared without braking, resulting in a greater loss of momentum; although the speed run-up resulting loss but still the focus of changes in the relative speed of the most reasonable.Recommendations based on the findings:Strengthening the leg strength exercises, specifically in the form of hard right leg; in force in the form of a clear right leg on the premise repeated step spears practice to minimize the magnitude of the right leg cushion; experience left leg firmly support the Effectiveness of Javelin Throw effect.After not too much beyond the pursuit of larger equipment, to maintain a reasonable trunk inclination angle, do step on Imitation, in the case of kicking the buffer and quickly realize the right leg after throwing torso inclination size on the successful completion of the impact of the action.In the case of good throwing arm posture proceed 20-30 meters armed gunmen cross-step run-up exercises and practice the correct action to deepen stereotypes.Clear the Final Force "trunk whipping" role; repeatedly kicking leg transfer hip exercises, focusing experience right hip and left leg brake force torso form; repeated pulling a rubber band exercises his right leg after kicking experience turn torso The "full bow" action; repeated holding the ball throwing practice experience "whipping" the force of the shoulder, elbow, wrist turn acceleration and braking. |
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