The Tennis Serve Essays - Anatomical Terms Of Motion, Elbow, Serve

The Tennis Serve Essays - Anatomical Terms Of Motion, Elbow, Serve The Tennis Serve The tennis serve is the stroke that puts the ball in play and is often referred to as the most important stroke in the game of tennis. It has become a principle weapon of attack and is used to place the opponent on the defensive by forcing a return from the weak side or by moving the receiver out of position. A good strong serve can sometimes be the basis of winning a game of tennis. I have included eight picture sequences to illustrate the tennis serve. Represented in picture A is the stance of the serve. In this part of the serve, the person needs to take a position sideways to the net, about three or four feet to the right center mark behind the baseline. The left foot is two to three inches behind the line, the toes pointing toward the net post. The back foot is parallel to the baseline and spread conformably from the front. Pictures B and C represent the preparation phase. In these pictures, the execution of the ball toss is performed. The ball toss is the key to a well-executed serve: a good release consistently places the ball in the proper hitting position. A poor release can throw off timing and ultimately cause a bad serve. In pictures D-F the action phase is represented. In picture D of the action phase, the elbow reaches a position slightly higher than the shoulder, then the elbow bends and the racket head drops down behind the back into what is called the back scratching position. In picture E, the ball should be at its maximum height of the toss before striking it. In picture F, the last of the action phase, the movement of striking the ball is explosive in an upward and forward motion until contact Pictures G and H represent the follow through. In the follow through the action is performed up and out, not down, in the direction of the intended target area. The follow through is a natural continuation of the stroke. A good follow through will help prepare for the next step in approaching the net for a return. Kinematics is defined as the study of motion. It is compiled of different bodily planes and different joint motions. In the beginning of the serve, during the stance (picture A), the feet are outwardly rotated. The hips and the trunk are extended. The left shoulder is slightly flexed along with the right shoulder and the shoulder girdles are slightly abducted. Both of the wrists are pronated with the elbows slightly flexed. During the preparation (pictures B and C) the feet are still in an outwardly rotated position. The hips slightly abduct with the trunk still in full extension. The shoulders are abducted, with slight elevation of the shoulder girdle. Both elbows are extended, but the right wrist stays in a pronated position and the left wrist is supinated. During the action (pictures D-F) the right foot inwardly rotates along with it performing planter flexion but the left foot stays in an outwardly rotated position. The hips are adducted but then they shift to abduction. The trunk starts in hyperextension then get fully extended and slightly rotate to the left. Both knees flex but the left knee extends while the right knee stays flexed. The left shoulder goes from flexion to extension while the right shoulder performs high diagonal adduction. The left elbow goes from extension to flexion and the right elbow goes from flexion to extension. The left hand goes from supination to pronation while the right hand stays in a pronated position. Finally, during the follow through (pictures G and H) the left foot inwardly rotates along with some planter flexion. The right foot inwardly rotates and goes back to a naturally flat position. Both hips are flexed along with the flexion of the trunk and it's rotation. The left shoulder remains in an extended position but the right shoulder follows through with the high diagonal adduction, while both shoulder girdles perform abduction. The right elbow slightly flexes but the left elbow extends. The knees go from flexion to a greater degree of flexion. The kinematics of the tennis serve is a complicated thing, it consist of