Research On Weak Links Of Diagnosis And Improvement Of Volleyball Players' Spike Movement

This study trying to extract test movement,test index,index of diagnosis correlation highly with special physical training through the literature research,test method and expert interview method and to build muscle diagnostic system of volleyball players' weak links.By using kistler and motion capture system to diagnosis strength of jumping movement,and using the Primus BTE system to diagnosis spiking movement.Describing strength characteristics of thevolleyball players' test movement and diagnosis index,and clearing diagnosis standard of weak links.Then,verifying the effect of movement training through the experiment.The results of the study are as follows:1.The framework of weak links' diagnosis including seven test movements,nine test indexes and six diagnosis indexes.To clear about the diagnosis standard and to improve the weak link through the movement training.2.The action of jumping tests,the comparison between the sexes,women volleyball players starting strength is good,should improve the reaction strengthen of the knee,ankle muscles and improve muscle strength and hypertrophy.The comparison between roles,the side spiker's power is best,setter/libero have the best starting strength.The comparison between jump ability,Athletes who jump higher have better speed strength and maximum strength.The comparison between the bilateral,the left leg using hip and ankle more,and the right leg using hip,knee more.Correlation analysis,the height correlation to speed strength,explosive force and the left side of the muscle.3.Elastic contribution of diagnosis index in jumping movement,the comparison between the sexes,the elastic contribution is not related to muscle mass.Large elastic contribution of athletes have better speed strength and explosive force and deficit is small.Increasing the explosive force and reaction force can improve the elastic contribution.Swimming arm contribution of diagnosis index,the comparison between the sexes,the swing arm contribution is significant different.Comparisonbetween the bilateral,range and speed is larger on the left side swing arm,we should pay more attention on left arm.Correlation analysis,and to improve the contribution should focus on improving the range of swing arm,at the same time strengthening the movements' speed strength and explosive force.Running-up contribution of diagnosis index,the comparison between the sexes,women athletes' knee,plantar flexors mass force is bigger,should attach importance to the knee,ankle joint reaction force.Athletes who run-up contribution is bigger has more power.Correlation analysis,improving the run-up contribution should focus on power and reaction forces of the movement training.4.On the diagnosis index of spiking movement,male athletes' strength of torso rotation and flexion is better and women athletes should focus on the action of power training on torso rotation and flexion.Indicators of the standard deviation of the male and female athletes is larger,male and female athletes should diagnosis respectively.5.According to the diagnostic index to calculate the diagnostic standard by the height and power of the test indicators,then,to find the weak link of spike movement,through the movement training on special strength theme,the athletes have improved effectively.