Movement Skills: Tennis Serve1a. The tennis serve is divided into eight specific phases, which include: the initial position/preparation, ball throw and backswing, knee bend, trophy position, racket drop, leg push, swing and pronation, and finally the follow-up. through. o Initial position/Preparation This is the physiological phase for tennis players. This is where the athlete determines the position and type of serve and takes into account the opponent's positioning and prior knowledge of the opponent. This begins with a continental hold that lasted until the final follow-through. Muscle activation in the scapula region is very low in this phase due to low demand. The goal of the start is to align the body to utilize the ground for force/power generation throughout the serving motion. The tennis ball is held at the throat of the racket and the left/right foot is rotated at a 45 degree angle facing the net post. Essentially, the eyes should be focused on the service box in preparation for the service. It is essential that the athlete is calm and strategic as frustration and anxiety during this phase can lead to a decline in performance, the serve must be relaxed and fluid. o Throwing the ball and backswing The throwing phase of the ball is the most important part of the entire tennis movement. This phase occurs instantly when the ball is released from the hand. During this movement there is very little muscle activation in the spinal erectors, especially during the initiation and release phases, although the movement steadily increases during this position slightly lateral to the head, allowing contact with the ball at 100 degrees of arm abduction. If the ball is thrown too close to the head it can increase arm abduction.Examination...... middle of paper......ntum.CENTER OF GRAVITYThe center of gravity is vital to performance in the serve tennis, the center It is known that gravity also affects balance and momentum, which are also very important, therefore the player's center of gravity should be as uniform as possible to ensure maximum opportunity. In the backswing phase of the serve you notice that the center of gravity shifts backwards, allowing the racket arm to extend further behind the back. During the different phases of the service the COG changes because the body segments can move their masses with joint rotations. Maintaining our center of gravity and ensuring balance significantly increases the results of the game, with balance and solid serves it is unlikely that injuries due to loss of balance and damage to the muscles will occur. BASE OF SUPPORT The base of support APPLICATION FORCES ABSORPTION FORCES