Kinematics Analysis Of The Skill Of Killing The Ball On The Back Field Of The Badminton Elective Class In Sports Colleges And Universities

The purpose of the study is:This paper uses the experimental method to kinematics analysis of technical movements of badminton backcourt overhead smash,through the test of the students in the move before hitting a ball,the racket and swing the ball in three stages,the motion parameters measured were analyzed,found the kinematic characteristic and principle of badminton backcourt head area smash technology,as the reference for the technical guidance of badminton training,but also can provide the experimental basis for the improvement of students and learning skills.Subjects and methods:This paper adopts experimental method of 9 Guangzhou Sports University Badminton Class carried out kinematics analysis on the technical movements of the head backcourt smash.This study uses Vicon 3D motion capture system,test the badminton backcourt overhead smash technology action process,subject to the Guangzhou Sports University 9 badminton classes?for a right hander?,the shooting and other factors,in the later data processing,choose 9 students analysis of the data.According to Zhou Xiao Zhou Xiao^[1].Of Jiangsu Province outstanding youth badminton player,hit better head back kinematics analysis of[D].Nanjing Sport Institute,2014]]'s research results:a mobile phase will shoulder angle control at 60degrees to 80 degrees so as to increase the racket racket in the distance,thereby increasing the speed of swing.The shoulder joint angle according to the experiment before the measurement of 9 students take a stage in the movement of the 9 students were divided into three groups,A group of shoulder joint angle:70 degrees less than80 degrees,B group of shoulder joint angle:60 degrees below 70 degrees,C group of shoulder joint angle:60 degrees,three for each group students.In the film,each student ten shooting back overhead smash skill,through the evaluation of badminton professional class teacher selection,they agreed that one of the best effects and action as the research and analysis of motion video motion analysis on the backcourt overhead smash skill.The results of the study:The shoulder joint angle of 1.moves in the backcourt overhead smash take a stage are increased in the A group?shoulder angle 73.66+2.15??elbow angle 53.15+1.87?than group B?shoulder joint angle of 68.86?+1.25?57.29+3.30 angle of elbow joint and shoulder joint?C group?the angle of 56.91?+0.62?elbow angle66.80+7.78?,shoulder joint angle,elbow angle is small,the forearm from the body,arm short time;mobile time is short,long distance,fast moving speed,ready for the racket stage;and B group,C group of shoulder joint angle,elbow angle,arm long time,moving time long,short distance,moving slowly,as the racket to do not fully.2.in the backcourt overhead smash racket stage,analyze the test data:A group?right ankle angle?116.88+4.90?right knee angle 137.59+8.36?than group B?right ankle angle?104.64+1.11?right knee angle 116.15+2.48?,C group?right ankle angle 93.82+3.77??right knee angle 127.63+1.97?ankle joint angle,knee joint angle.Ankle joint angle large group A students to stretch,the knee angle large group A students a short time to prepare for the swing phase;and B group,C group of ankle joint angle is small,stretching is not sufficient,the knee angle is small,indicating Pactrometer push for too long time too long will affect the ball point selection.3.at the back swing overhead smash stage,analyze through the motion parameters of the three groups of students:a swing movement process of the three groups are in line with the"whip principle",but there are still differences between the three groups,A group?28.73+5.56?swing speed,hitting time of shoulder joint angle is small?72.75+2.74?,the ball in front,angle of wrist?85.06+2.43?,hitting the wrist is obvious;and group B?18.24+2.95?,C group?13.05+0.29?of the swing speed slow,hitting time in group B?83.66+9.79?,C group?98.65+0.79?the shoulder joint angle,the ball back,B group?92.56+1.08?,C group?98.81+1.12?wrist angle,wrist is not obvious,the poor quality of the smash.The conclusions are as follows:1.back overhead smash skill better,in the mobile take a stage showing the shoulder joint angle,elbow angle is small,the forearm from the body,the kinematic characteristics of short arm waving.2.back overhead smash skill better,in the racket stage showed the shoulder joint angle increases,elbow lift,head down,hip joint angle,knee joint kinematics characteristics of left knee joint angle smaller than.3.back overhead smash skill better,in the swing phase shows the shoulder angle decreases,the ball in front,wrist angle,wrist,swing speed,kinematic characteristics follow the principle of whipping.