테니스 서브의 운동학적 분석 = The Kinematical Analysis of The Tennis Serve

다국어 초록 (Multilingual Abstract)

This study carried out a kinematical analysis of four tennis players' serve motions, and drew conclusions as follows.
1. As for service footwork, all the four players preferred the pose of pin-point stance.
2. The width of back swing stance was around one third of their height.
3. All the four players landed first their left foot into the court just after impacting, and jump on impacting was generally high but they had the style of foot-up, in which their first step hardly entered into the court.
4. The forwarding speed of the body center appeared highest just before impacting and lowered slightly just after impacting.
5. The height of toss appeared low in general.
6. According to the moving track of the racket head center, player s1 and s2 used fiat serves in which the racket head did not move right or left and player s3 and s1 spin serves in which the racket head moved significantly to right or left.
7. What appeared to play the largest role in speeding the racket head was segmental motion by the inner twist of the upper arm.