The Factors And Training Countermeasures Of The Female Volleyball Athletes Forced By Lateral Knee Joint Trauma As Taking Off In College

Based on five subjects spiking the takeoff stage of research, sports biomechanics research tools and methods dynamic data analysis, the take-off stage of experimental research, and on this basis, kinematics and dynamics to achieve the synchronization of data collection, analysis takeoff stage to the technical characteristics of the mechanical principles enshrined. The experiment was divided into two groups: plantar pressure experiments and technological experiments. Using plantar pressure distribution systems and kinematics analysis system synchronous test Plantar pressure system can test the takeoff when the focus changes; Kinematics analysis system can be used with two-dimensional video synchronization dynamometer tests Analysis of the United States used the video image analysis system to analyze horizontal take-off and screen technology for the analysis.Take-off is spiking Jump Class Action, the paper choice "for the best hitting high" logic bps Jump to theoretical basis for research to take off for spiking control, the use of statistical analysis to deal with cases of a combination of methods, kinematics and dynamics of the parameters between the inherent logic and the impact of the effect of spiking takeoff external laws were discussed.For these women's volleyball team of outstanding athletes spiking takeoff stage of the technical characteristics of the analysis and dynamic characteristics of the revelation against volleyball athletes participated in the training injury, Sports Biomechanics on the relevant principles and methods of Run-up to the volleyball technical factors affecting the exploration of study. Volleyball for teaching, training provided scientific theory. And the corresponding response training. The main conclusion of the studyMajor findings:1 Plantar pressure with a time change is the impact of Take-off one of the main factors. Take-off phase "slow-cut" and "quick-cut" two brake.2 different transmission characteristics of plantar pressure reflect the different technical characteristics, thus forming different sports results. Plantar pressure distribution and technical moves with consistency, technical moves can be certain minor changes thereby changing the characteristics of the foot.3 From time analysis, the impact of the process to complete the take-off time of the main factors males, Second, athletes technology. Takeoff completed by the time the process is completed Take-off quality decisive factor. Takeoff from the stage of the process time characteristic analysis : (1) in the left foot braking phase of the hip flexion movement buffer should be completed Braking will reduce the movement of large joint direct takeoff. (2) buffer left knee in improving the quality of spiking her right knee fatigue and reduce the probability of injury. (3) to rationalize the process of swinging his left leg in a relatively hip and knee weight distribution to reduce the proportion of time buffer. (4) without affecting the integrity takeoff action on the basis of the quality of the use of the time at least, it can get the biggest take-off height.4 Take-off stage of hip, knee, ankle displacement-time curve of common problems : (1) Takeoff process mainly rely on the left leg and ankle joints right knee.(2) Take-off in the process of lower limb joints on both sides of the distance between varies from person to person, a short distance will be easier to make the left leg hip, knee, Ankle share of the power system more, the left knee and ankle premature fatigue easily, but before takeoff knee bending too little will affect takeoff speed. Far from the level of losses excessive speed, easily decentralized power. In this study the best distance in the knee was about 30cm.5 Take-off from the stage of the joint angle of view to her right knee four athletes to the smallest point average: 105 o. When the left foot braking left knee instantaneous angle average : 147.2 o. Many studies of the general will be conducive to the point of bouncing to 110 o -120 o. I think that there are certain problems expression.6 Right foot to the left to stage small angle of the knee two advantages : (1) Swing legs left leg buckling knee appropriate form smaller knee angle, reduce the moment of inertia, accelerate the run-up speed, the left foot braking and reduce the time to support her right knee. The projectile velocity of the largest feet from the stage to the point of difference knees around 30 o, Have the right knee angle in the biggest stage projectile velocity suddenly rose above 70 o, and the left knee angle to reach a balance. (2) Facilitate the maximum projectile velocity began to focus in maintaining balance and body control in the segmental plane. Make about the knee angle not exceeding 10 o circumstances synchronous takeoff.