| Objective: this study attempts to have a thorough and comprehensive kinematics analysis tothe technology of man badminton players’ picking the ball before the net in the CapitalInstitute of Physical Education from3d Angle under the existing objective conditions in orderto reveal the space technology motion law and characteristics of badminton nets forehandpicking the ball. We try to discuss the key factor of affecting the motion quality of thebadminton players’ picking the ball before the net through the analysis of the lower limbs,trunk, upper limbs (the pat arm) of the kinematics characteristic and the track of the center ofgravity of the athletes which will provide relevant data and scientific basis for the coaches toguide future training and competition.Methods: the study films the whole simulated game process of five men’s singles player atCapital Institute of Physical Education majoring in badminton by using two sets ofSONY1080i high speed camera with same specification, from which picking the best as theobject of study，we complete3-d analysis and carry out kinematics analysis to technicalmovements.Results:1. at the stage of mobile, the time the five players spend and the distance of their leftand right foot move are: Chi Gong,0.46s,0.903m、1.421m Mengnan Niu,0.60s,0.930m1.607m, Weizheng Tian,0.09s,0.440m、1.481m，Le Yu,0.46s,0.846m、1.504m BaojunZhang,0.68s,1.122m、1.788m.2.at the stage of racketing,5athletes’ torso turn Angle increases; at the end of the stage, theangle of five play shoulder, elbow, wrist: Gong Chi75.799,167.913°,92.586, MengnanNiu,80.312°,172.845°,94.188°, Weizheng Tian,86.277°,176.070°,95.655°, LeYu,86.532°,177.699°,94.259°, Baojun Zhang89.856°,170.624°,96.143°. The angle of5athletes’ lower limbs left and right knee respectively is: Chi Gong90.091°,100.755°,Mengnan Niu,160.696°,130.591°, Weizheng Tian,165.732°,150.846°, Le Yu,160.096°,137.713°, Baojun Zhang135.058°,132.123°.3. At the stage of swinging racket and hitting the badminton, the time which five players spendand the distance of swinging the racket are: Chi Gong,0.06s,1.00m; Mengnan Niu,0.08s,1.60m Weizheng Tian0.10s,1.56m, Le Yu0.08s1.12m, Baojun Zhang0.08s,1.20m.The order of appearing at the maximum speed on the every part of the right upper limbs iship—shoulder—elbow—wrist—the tips of the fingers—racket. Among five players, MengnanNiu and Weizheng Tian are hitting the badminton with the biggest speed, being24.495m/s,21.008m/s. The total speed of Mengnan Niu, Weizheng Tian and Le Yu reach the maximum atthe moment of hitting. While Gong Chi and Baojun Zhang reach it at the0.02s before hitting.4. At the stage of swinging with the badminton the time which five players spend and thedistance of their feet move are: Chi Gong,1.36s、0.504m、1.165m Mengnan Niu,1.58s、0.663m、1.482m， Weizheng Tian0.86s、0.426m、1.401m， Le Yu1.32s、0.649m、1.269m，Baojun Zhang1.52s、1.009m、1.539m.Conclusion:1. at the stage of mobile the distance of five athletes’ right foot move is greaterthan that of the left foot; In the process of moving except Gong Chi whose centre of gravitybecomes lower, the remaining four people’s appear the trend of falling at first, then rising. Theranges of both are not too much. At the end of mobile, Baojun Zhang’s and Le Yu’s racketsare lower than elbow joints, which is not good for its spinning out at the stage of racketing. In addition Le Yu’s elbow joints don’t remain the state of relaxation.2. At the stage of racketing, the angle of five players’ torso turning present the trend ofincreasing, which is in line with the technology principle of picking the badminton netsforehand. Baojun Zhang’s feet has already been at the ground, which is not good for the stageof swinging and hitting the badminton，and whose hips are in the trend of increasing andwhose centre of gravity transfer from the left foot to between feet, leading to the reduction ofthe racketing distance. In the process, the reduction of Chi Gong’s knee joint lead to the stateof lower limb’s deficiency and limit the distance of the swinging. The angle of five player’sshoulder joints and elbow joints are increasing, finally close to180, while the angle of wristjoints are decreasing, finally close to90°.3. The order of the maximum speed of every part in the entire right side is hip, shoulder, elbow,wrist, the tips of the fingers, the racket, which accord with the principle of scourge in theexercise. In the process of swinging and hitting the badminton, Mengnan Niu’s left leg moveto the direction of hitting, which increase the instability of the lower limbs support and mayaffect recovering. The fingers of Le Yu don’t play a role of moving the racquet. With legsvirtual kneeling, Chi Gong hit the ball with lower speed and don’t return timely.4. At the stage of swinging with the badminton, the time Weizheng Tian spend recovering isthe shortest and the distance of feet’s moving in the stage of mobile and recover stays the same.The remaining four players spend more time recovering and there is much difference betweenthe mobile and recover. |
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