An Empirical Study On The Diagnosis Of Forehand Attack Technique Of The Table Tennis Beginners

Research purpose: This article uses a motion capture system to compare and analyze the kinematics of the forehand attack movements of national first-class athletes and college beginners,to find the differences between the two;to compare the theoretical differences with the coach's oral description of the beginner's wrong actions;to correspond and combine the data expression with oral expression;to obtain the correspondence relation serves as the theoretical basis for the beginner's action evaluation and the feedback system development,so that wen can diagnose and analyze the forehand attack technique of beginners scientific and reasonable;to promote the beginner forehand attack technique movement form fix and quickly.Research method: In this paper,the spatial feature data of joint points of 10 national first-class athletes and 20 table tennis beginners' forehand movements are collected,and the 30 effective videos captured are analyzed using the SIMI Motion capture analysis system.In the course of the experiment for beginners,the teacher will describe the errors and corrective methods of his attacking action,and the experimenter will make a complete record.According to the characteristics of each joint of the forehand attack of 10 national first-class athletes,the differences between the beginners and the national first-class athletes were compared and corresponding to the errors described by the teachers.It provides corresponding diagnosis results for beginners to learn the movements during forehand attack.Research results:(1)There was no significant difference in the shoulder and hip angle between the 20 beginners and the national first-class athletes at the end of the lead stroke.(P> 0.05);No.4,5,9,20 at the end of the swing there is a significant difference between the shoulder hip angle and national first-class athletes(p <0.05);20 beginners and national first-class athletes at the end of the shoot.There was no significant difference in the shoulder-arm angle at the time(p> 0.05);there was a difference between the shoulder-arm angle of national first-class athletes at the end of the swing for beginners 1,2,6,11,12,16,18(p <0.05).(2)There was a difference between the elbow angle of the beginners 1,5,11,17,and 18 at the end of the lead stroke and that of national first-class athletes.(p <0.05);At the end of the swing,the beginners of subjects 3,4,8,13,14 had differences in elbow joint angles with national first-class athletes(p <0.05);There was a difference between the wrist angles of the beginners at the end of the forehand attack on the No.6,12,13,15 at the end of the forehand attack and the wrist angles of the national first-class athletes at the end of the induction(p <0.05);There was no significant difference between the wrist angle of the 20 beginners at the end of the forehand swing and the wrist angle of national first-class athletes(p> 0.05).(3)No.2,3,4,8,11,14,19 Beginners at the end of the forehand draw no difference between the knee angle of the right leg and national first-class athletes,the knee angle of the left leg.There is no difference with national first-class athletes(p> 0.05).(4)Except for subjects 6,7,15,17,20,the rest of the subjects' bodies at the end of the forehand lead stroke.There is a difference between the twist angle and the body twist angle of national first-class athletes(p <0.05);the body twist angle of 20 beginners at the end of the forehand swing and the national first-class athletes at the end of the forehand swing.There is no difference in torsion angle(p> 0.05).There were differences between the forearm twist angle of the 4th,8th,9th and 16 th beginners at the end of the forehand stroke leading racket and that of the forearm of national first-class athletes(p <0.05);There was no difference between the forearm twist at the end of the forehand attack swing and the forearm twist at the end of the forehand attack swing for national first-class athletes(p> 0.05).Research conclusions:(1)The angle of shoulder and hip in swing phase reflects the height of elbow joint.The greater the shoulder-hip Angle,the greater the z-axis value of the elbow joint,and the elbow lifting phenomenon occurs.The size of the shoulder arm angle reflects the width of the upper arm to the left and forward.The larger the shoulder arm angle,the less the swing direction of the action is to the left and forward.There is no phenomenon of swinging to the left and up.(2)The Angle of the elbow reflects the distance between the forearm and the upper body.The larger the angle,the farther the distance is.There is a phenomenon of swinging the forearm without closing the forearm.(3)The change of the wrist joint angle affects the hitting position.The forearm twist angle reflects the forward tilt angle.The smaller the forearm twist angle,the leaner the back of the racket.(4)The twist angle of the body reflects the width of the waist during the shoot and swing phases.The larger the twist angle of the body,the larger the waist;...