A Kinematic Analysis Of Block Hoisting And Block Shooting Of Badminton Majors In Shenyang Sports University

Block hoisting and block shooting are general techniques in badminton midfield.Block hoisting is a blocked blow to the other player's attack clear,which is conducted by stretching the badminton racket at the hitting point as high as possible.It makes a ball fly in a slower speed in a inclined downtrend and larger curve,and the ball will descend vertically over the net.block shooting is a blocked pushing blow to the other player's attack clear,which is also conducted by stretching the badminton racket at the hitting point as high as possible.However,it makes a ball fly in a faster speed in a inclined and flatter curve,and the ball will be attacked fast over the net to the other area.The proper use of block hoisting and block shooting on the court can change the rhythm and make players obtain initiatives.Therefore,it is of significance and value to study block hoisting and block shooting techniques in badminton midfield.Meanwhile,it also provides some theoretical implications for teachers in teaching raining.The current study focuses on hitting a ball with the right hand.Literature review,imaging measurement and mathematical statistics have been adopted in this study to conduct a kinematic analysis on block hoisting and block shooting,which aims to offer some practical implications for badminton teaching training and competition.The major findings of this study are as follows: There are two technical kinematic parameters and characteristics through kinematic analyzing on block hoisting and block shooting.1.In terms of the complete action,the operating time of block hoisting is 333 frames(0.83 seconds),and the operating time of block shooting becomes 289 frames(0.72 seconds).In addition,the operating time of block hoisting is 257 frames(0.64 seconds),and the operating time of block shooting is 235frames(0.58 seconds)in terms of the moment of hitting a ball.The results indicate that the action of block shooting is faster than action of block hoisting.Besides,the time scale for each movement is basically consistent.2.At the moment of hitting a ball with block hoisting,the angle of the wrist joint is 163.20 degrees.Then,the angle becomes 153.54 degrees after 0.05 seconds.At the moment of hitting a ball with block shooting,the angle of the wrist joint is 153.54 degrees.Then,the angle becomes 159.54 degrees after 0.05 seconds.The different bending degrees of wrist joint can make different angles of the bat when hitting a ball.Besides,the differences can also make different flying route of the ball.3.At the moment of hitting a ball,the operating speed of the racket with block hoisting is 3.74 m/s,and the velocity of the ball is 4.09 m/s;the operating speed of the racketwith block shooting is 4.00 m/s,and the velocity of the ball is 6.62 m/s.The results indicate that the speed of the racket and the ball of block shooting are greater than those of block hoisting.In addition,the speed of the racket directly affect the ball hitting.4.As to the position of hitting a ball,it sets higher behind the body when hitting a ball with block hoisting.However,it sets in front of the body when hitting a ball with block shooting.Apparently,the position of hitting a ball directly affect the ball hitting.The order of activities of body parts in both block hoisting and block shooting is as follows: right ankle?right knee?the right hip?right shoulder?right elbow?right wrist.The order is in accord with the principle of beating techniques.Through lower limbs-body-upper limbs,the players can obtain the maximum speed and momentum before hitting a ball.6.The kinematic parameters of body parts are similar in backswing and fulling swing in block hoisting and block shooting,which indicates high consistent in movement structures.The suggestions of this study are as follows: 1.In the process of teaching block hoisting and block shooting,the coach should appropriately pay attention to the training of lower-limb explosive strength according to the students' physical situation.The training can make students achieve a higher commencing height to attain a higher position of hitting a ball.2.The coach should highlight the significant differences of the force of the wrist when he explains block hoisting and block shooting techniques for students.3.The coach should attach importance to the training of physical coordination for students,which can enhance the speed and stability of students' movements to ensure the effects of hitting a ball.4.In addition,the coach should enhance the training of theoretical knowledge for students and make students get a better understanding of the principles of some significant technical movements,like action stage,order of movements,the force of the wrist at hitting a ball,etc.Students can master the technical movements based on the theoretical guidance.5.According to the differences between block hoisting and block shooting,the coach should lead students to think seriously about the differences among techniques in badminton,such as the high ball,attack clear,lob and smash in the back court;chop,hook and push in the front court.The coach should make students explore other techniques in badminton through studying these two technical movements.6.When teaching movement concordance in block hoisting and block shooting,the coach should employ the training including multiple technical movements.For instance,when practicing backswing and fulling swing in lob and smash,students should highlight the movement concordance.It is significant to have repeated training and learn from each other to deal with the fast and slow alternation,flexibly conduct the technical movements and employ proper strategicarrangement in actual competitions.