VIRTUAL RECONSTRUCTION KINEMATICS ON THE START ACTION OF ELITE MALE SHORT TRACK SPEED SKATERS UNDER NEW RULES:A COMPARISON ANALYSIS

The gradual improvement of athletic performance and ability of sports has put forward higher requirements for the scientific level of training, among which the simulation of athlete \u27s action is an important research method and means.Short track speed skating has always been a traditional advantage project of our country. In the 500m competition of short track speed skating, occupy a good position in the starting phase has an important influence on the whole process of the competition,which can make the athlete enter the corner in advance and thus successfully complete the acceleration phase.The International Skating Union (ISU）changed the rules of start action,and various starting actions emerged.The athlete of National Short Track Speed Skating Team named Wu Dajing(Champion of Men’s 500m in 2016/17 Season)changed his technique of start action, he is the only one who use lateral type start action in National Team.This paper uses the three-dimensional video analysis method to analyze the kinematics parameters of start action of Wu Dajing and Canadian athlete Charles Hamelin (who has been using the lateral starting action) at the 500m competition of 2016/17 ISU World Cup in Shanghai. Indicating that technical parameter of the start action of Wu Dajing (center of gravity, trunk angle, pedal ice angle, lower limb joint angle, etc.) are better than Charles, the pedal effect is better than Charles, which shows that he has a good learning ability of the new technology , it is recommended in the training he should focus on improving the stability of start action

STUDIES ON THE KINEMATICS OF CHINESE ELITE MAN HAMMER ATHLETE THROWING TECHNOLOGY

The purpose of this study is to provide the theoretical basis for the teaching and training of the hammer throwing and improve Chinese man hammer to reach world-class as soon as possible.This paper made a 3D camera resolution on the top three men's hammer throwers in 2012 China Long Throw Open (Shizhu Wang, kun Guo and xiao Feng). With the comparative analysis on the related kinematic parameters of the world elite men's hammer throwers, it presents the main problems and gaps in China men's hammer throwers motion technology

KINEMATIC ANALYSIS OF BASKET WITH 1/2 TURN TO HANDSTAND OF HAIBIN TENG ON PARALLEL BARS

The basket with 1/2 turn to handstand has become a powerful weapon of world famous competition for the gold medal of parallel bars. Therefore, we make movement analysis on Haibin Teng, who won the champion in Athens Olympic, over the movement in qualification trial, and obtained kinematics references, which provides theoretical and technical basis for the development and improvement of the skill of Chinese athletes

KINEMATIC ANALYSIS OF LI YA SALTO CONNECTING STRADDLED JAEGER SALTO ON THE UNEVEN BARS

He Kexin, called the “UB princess”, is the only individual event grand slam winner on uneven bars of the Chinese Women's Gymnastics Team. Her special skill “Straddled Jaeger Salto with a 1/2 Turn to re-grasp HB (also called Li Ya Salto) connecting the Straddled Jaeger Salto” was videotaped and 3-D analyzed. The conclusive kinematic characteristics of this high skilled element can provide useful information for the technical training of coaches and athletes, and enrich gymnastic theories

WEIGHT LIFTING TECHNOLOGY BIOMECHANICS RAPID FEED BACK SYSTEM STUDY

Weightlifting is one of the important part of the Olympic. For a variety of reasons, the coach is by observation and experience qualitative methods on, the athletes technical action guide to further reveal the characteristics of technical action. The hope to be able to the test the qualitative and quantitative test of real combination more looking forward to the kinematics and dynamics of the key indicators. So after consulting a large number of literature and coaches discussion, we make the sports biomechanics research weight lifting technology rapid diagnosis system, the use of 3rd load station acquisition lower limb legal date, combining synchronous acquisition. Barbell center kinematics parameters to rapid analysis weightlifting action techniques. Help improve weightlifting athletes technical effect

KINEMATICS ANALYSIS ON HANDSPRING SIDEWAYS STRETCHED SIDEWARD SOMERSAULT WITH 1 3/4 TURNS IN HORSE-VAULTING OF ZEPENG LUO

By using the 3D video analysis method, we have tested on the handspring sideways stretched side-ward somersault with 1 3/4 turns in Horse-vaulting (also known as Kasamatsu 360°) of Chinese elite athletes Zepeng Luo at the game site; obtain the relevant kinematics’ parameters through analysis on the complete movement. The results show that: Zepeng Luo completed this action with high quality and advanced technology, but at the first flight, his legs were not fully close together

STUDY ON KNEE JOINT ISOKINETIC STRENGTH OF MALE VOLLEYBALLPLAYERS

The purpose of this study is to measure the knee joint mechanics of eight elite volleyball players using isokinetic system and to discuss the possible diagnosis of injury risk of the results. Isokinetic-concentric contraction peak torque of the knee flexors and extensors decreased when angular velocity increased. With the same angular velocity, extension peak torque became higher than flexion peak torque. There was also a significant difference between the left and right knees in each flexion and extension peak torques. As the angular velocity increased, the flexion to extension peak torque ratios decreased; at the same time, average power increased while the work done decreased. The extensors showed greater work done than the flexors. The knee torque curves could be used as evidence for diagnosis of possible knee injury risks among volleyball players

KINEMATIC ANALYSIS ON SERVE TECHNIQUE OF WORLD’S ELITE FEMALE TENNIS PLAYER

The purpose of this study was to obtain the kinematic parameters on serve technique of WTA (Women's Tennis Association) top two Serena Williams and Simona Halep. The study selected WTA top two players’ first serve in 2014 China Open, which was held in Beijing, China. This paper makes analysis on serve technique between two elite players through the method of three-dimensional video analysis. The kinematic technical feature has been obtained through this study, resulting in not only providing referential statistics for the technical training of the players, but also enriching the technical theory of tennis

KINEMATIC ANALYSIS OF ELITE MALE TENNIS PLAYER'S STEP MOVEMENT FOR RETURN OF SERVICE

A three-dimensional camera analytic method was used to make kinematic analysis on three players' step movement for return of service in finals and semi-finals of the ATP Champions Tour. The movements were broke down to three stages (preparation stage, skip step stage, stroke stage) for analyzing the kinetic parameters. Then the kinematic characteristics of elite tennis player’s step movement for return of service were derived, to serve as reference for skill training and tennis matches. It was found that: in the preparation stage, Sampres, Aynaoui and Moya have an average horizontal angle between the feet of 12.1deg., 2.2deg., 45.6deg.respectively. In the stroke stage, the travel distances of Sampras and Moya were found to be greatly differed (0.892m and 0.667m respectively), and move faster (2.23m/s and 1.96m/s respectively)

COMPARATIVE KINEMATIC ANALYSIS OF ENQVIST AND MOYA’S TENNIS SERVE TECHNOLOGY

Serving occupies a more important role in the modern tennis. The tennis serve of two players, Thomas Enqvist and Carles Moya, were filmed in the semifinals of Chengdu Open-ATP Champions Tour and analysed with three-dimensional video analysis. The serve was divided into three stages as follows: throwing ball rising racket stage, backward swing stage, forward swing hitting stage. It is found that: in the first stage, the maximum value of shoulder-hip level projection angle of Enqvist and Moya are 18.5° and 28.7° respectively. In the second stage, Enqvist and Moya’s extension range of left knee joint were 55.1° and 34.6°.Their e angular velocity were 182.6°/s and 170.4°/s. In the third stage, Enqvist and Moya’s hitting height were 2.23m and 2.15m, Hitting height and body height ratio were 1.18 and 1.13, there are significant differences