Kinematic Analysis Of The Turning Flick Ball Changes Of Jive

Research purposes: From the perspective of kinematics,this paper used three-dimensional images to photograph the whole movement of the cowboy dance of 16 students in the dance performance major of Xi’an Physical Education University.According to the needs of the study,16 students were divided into excellent group and ordinary group,and the kinematic parameters of the two groups of students,such as the time characteristics of completing the whole movement,the displacement characteristics of the body center of gravity,and the change characteristics of the angles of the joints of the lower limbs,were analyzed,The purpose of this study is to explore the kinematics rules of the "spin ball kick foot change" of the cowboy dance of athletes at different levels,find out the kinematics characteristics of the two groups of athletes when completing the action,and provide theoretical reference for the future training of athletes in cowboy dance and the improvement of teachers’ normal teaching.Research methods:This article uses literature materials methods such as expert interviews,experiments,and mathematical statistics,mainly adopts high-speed photography technology and three-dimensional image analysis to take three-dimensional images of the cowboy dance "spin ball kick foot change" movement,and obtains the kinematic characteristics information of elite athletes and ordinary athletes through the German three-dimensional motion capture and analysis system-Simi Motion system,Then use Excel 2019 to sort out the data and calculate the function,use SPSS 26.0 to compare the data of the two groups of horizontal athletes with independent sample T test,and finally use Origin 2021 to draw the curve of the movement track,so as to analyze the technical gap between the two groups of athletes,so as to obtain the analysis results of this study.The results of the study:(1)When the two groups of athletes complete the whole cowboy dance "spin ball kick foot change" movement with the same music,the overall time of the excellent group of athletes in each stage of the movement is longer than that of the ordinary group,especially at the end of the action.There are obvious differences between the excellent group of athletes and the ordinary group of athletes in the movement time.(2)There is no significant difference between the elite athletes and the ordinary athletes in other stages except the movement adjustment stage.In the movement adjustment stage,the displacement of the center of gravity in the X-axis direction is 0.318 ± 0.264 m for the excellent group and 0.372 ± 0.051 m for the ordinary group athletes.(3)In the whole cowboy dance movement of "rotating the ball and kicking the sole",the average speed of the center of gravity of the two groups of athletes is the largest in the X-axis direction,0.386m/s for the excellent group and 0.347m/s for the ordinary group,0.014m/s for the excellent group in the Y-axis direction,and 0.021m/s for the ordinary group,respectively.(4)At each stage of completing the action,the change trend of the angle of the hip,knee and ankle joints of the lower limbs of the two groups of athletes has similar characteristics,and the change of the angle of the hip,knee and ankle joints of the two groups of athletes has significant differences at different stages.(5)The rotation angle of the shoulder and hip of the excellent group athletes is greater than that of the ordinary group athletes at the beginning and end stages of the action.The rotation angle of the shoulder and hip of the excellent group athletes at the beginning stage is 15.517 ± 16.172 °,and that of the ordinary group athletes is 10.842 ± 8.801 °.The rotation angle of the shoulder and hip of the excellent group athletes at the end stage is 16.826 ± 13.305 °,and that of the ordinary group athletes is 13.807 ± 7.923 °.Research conclusions:(1)During the whole movement process of the two groups of athletes,the time of each stage of the action of the excellent group of athletes is different.The excellent group of athletes have a more accurate grasp of the music rhythm and a better understanding of the fast and slow rhythm than the ordinary group of athletes.Therefore,in the future training,students should strengthen the training of the basic technical music of cowboy dance.(2)The displacement of the athletes in the excellent group in the front and back directions during the adjustment stage is smaller than that of the athletes in the ordinary group,and the movement range of the athletes in the excellent group is small,so that the core strength of the body can be tightened when completing the rotation technology,making the rotation technology more fluent.(3)During the whole movement process of the two groups of athletes,the average speed of the center of gravity in the front and back directions of the excellent group and the ordinary group is the largest,and the average speed of the center of gravity in the up and down directions is the smallest,which is conducive to the athletes to find the central axis of the body and master the sense of direction of the movement.(4)The knee flexion and extension of the elite group athletes are significantly different from those of the ordinary group athletes at the time of springing and kicking technology.The use of the hip joint at the time of center of gravity conversion is more reasonable.The ankle joint can cooperate with the power leg to complete the springing and kicking technology at different stages.(5)At different stages of the movement,the excellent group athletes did better than the ordinary group athletes in shoulder and hip rotation,upper and lower body resistance range,and reflexive effect,which made the bounce technique and rotation technique of the cowboy dance "spin kick foot change" movement more obvious.