Study On Kinematics Of Table Tennis Backhand Inside Screw Of Different Sports Level Athletes

Objective:The main purpose of this study is by comparing the average level of athletes and the high level athletes in backhand inside screw kinematic characteristics of receiving technology, discover the backhand inside technology technical advantage and movement characteristic, trying to correct understanding of Taiwan within the backhand inside twist receiving technique characteristics, on the basis of the formation of scientific, standardized technical structure concept, perfecting the backhand side twist technology theoretical basis. At the same time, find the gap between ordinary level athletes and high level athletes, and to provide scientific and effective training. Methods:The research object of this study for the Chinese table tennis college professional youth post-binge level athletes six high level athlete group, Shanghai sports college sports education undergraduate six, namely ordinary group level athletes. According to this study serve machine speed setting two experimental conditions, the high speed driving is defined as a fast ball, low speed service is defined as the ball slow. Subjects using the backhand side twist technology receiving machine service. Experiments using Vicon Nexus kinesiology data analysis system, Motion- 4 x- high-speed cameras kinematics data synchronous acquisition table tennis; Using Visual 3 d analysis system and SIMI Motion analysis software for data processing and analysis; And application data with statistics software SPSS 21.0 results are independent sample T test, P = 0.05 for the significant difference level and extremely significant difference level of P = 0.01, the experimental data from both in the form of "mean + /- standard deviation" said. Results:In two kinds of experiment conditions, the ordinary level of athletes within the backhand side twist the ball speed is lower than the high level athletes, with significant difference. In two kinds of experimental conditions, the ordinary level of athletes within the backhand side twist out ball rotation are lower than the high level athletes, very significant difference.Under the condition of two experiments, different level athletes swing the racket in the process of movement in the same direction, but there are differences in every stage of the swing range of; Under two kinds of experimental conditions, different level athletes in different stages of the process of swinging time ratio, average level athletes racket back process of the whole process of the proportion of smaller, larger ratio reduction stage, but the difference is not significant.In two kinds of experimental conditions, different level athletes racket rate of hitting time there exist significant differences, average player hit the ball moment racket rate is smaller.Fast ball under the experimental conditions, different level athletes racket trajectory Angle of shot time are at about 45 °. Under different experimental conditions, the same level athletes contrast, ordinary level athletes racket trajectory Angle change is less than the high level athletes.Fastballexperimental conditions, the average player hit the ball time table tennis pat on face Angle is greater than the high level athletes, with significant difference.Fastball experimental conditions, the average player hit the ball time shoulder abduction Angle compared with the high level athletes is larger, with significant difference; At the same time, the average player hit the ball moments elbow flexion Angle is larger, with significant difference;Under the condition of two experiments, in addition to buckling shoulder joint angular velocity, angular velocity compared to the rest all joints shot moments movement, ordinary level athletes are smaller; In fast ball experimental conditions, the average player hit the ball moments within the shoulder joint angular velocity is small, and significant difference. Conclusion:Units within the backhand side screw technique in table tennis and flight speed of rotation, keeping the advantage of traditional attack technology.Taiwan backhand side twist technology in a cycle, swinging the racket first racket back toward the "left" and then to the "left front" swing direction to meet the ball, in the moment, the direction of the swinging Angle of about 45 ° or so, hit the ball after the "right" direction with potential swing, finally, the reduction in the direction of "left".Compared with the high level athletes, ordinary level athletes racket back process inadequate, ill-prepared for meet swing period; Reduction process slower, ill-prepared for the next shoot the ball. Technology emphasizes units within the backhand side twist to clap the ball control, ordinary level athletes should be taken in improving speed in the process of swing note down the racquet face at the same time, increase the friction of the ball.