A Biomechanical Analysis Of College Tennis Players' Forward And Reverse Volley Techniques

The purpose of this study is to collect data on kinematics and electromyography of interception technology,then analyze the kinematics parameters of the participants during the interception and the participation degree of the muscles and muscles in the lower limbs during the volley.It provides some scientific basis for tennis players to standardize the technical action of interception and to guide the training of coaches.Research conclusions: 1)Kinematic conclusion: At the moment of both feet off the ground,the center of gravity of the forehand volley at the time of take-off is biased to the right side,and the backhand volley is biased to the left side;at the moment both leg pad to the highest,the angles of hips and knees increased,indicating that the hips,knees,and knees all stretched during the time the legs were lifted to the highest moment.At the lowest point in the step,the elbow joint must be placed close to the body and the knees should be properly bent to lower the body's center of gravity and allow the leg muscles to store more elastic energy;at the end of turning shoulder moment,the reversed torso is tightened more tightly than the forehand volley and the front and back shots must be fully shoulder-turned and the head up;At the time of hitting the ball,the forehand volley is the wrist leading the body and the backhand volley is the elbow leading the body and the head is higher than the wrist;the front and back shots are fast swinging before the shot.When the ball is hit,it decreases,and after the ball hits the ball,it increases.At the farthest point of the forward swing,the subject's forehand and backhand volley follow the interception with a small amplitude,and the principle of swinging near the distance.2)Surface electromyography test conclusion: The left leg of the gastrocnemius muscle is larger than the right leg at the preparation stage,which means that the left leg is more powerful than the right leg,which is in line with the characteristics of the movement.Backhand volley is contrary to forehand volley,but also in line with the characteristics of the action.During the preparation phase,the gastrocnemius muscles that were intercepted by the forehand and backhand were the most active,and the gastrocnemius myoelectric signal was the largest,reaching 54 uVs.During this process,the gastrocnemius muscle fatigue was easily caused.In the sideways stage,the contribution rate was relatively small.The electromyographic values were all greater than those of the left foot,and the left foot was larger than the right foot.This indicates that the shift of the center of gravity has been completed in both the forehand and backhand volley.In the hitting phase,the supporting leg for the forehand volley is the left foot,the backhand volley is the right leg.The gastrocnemius muscles are the most contributing m uscles for the forehand and backhand volley.In the follow-up phase,the center of gravity has completely fallen on the forefoot,that is,the forehand following phase falls on the left foot and the backhand falls on the right foot.