테니스 서비스 동작의 운동역학적 분석 = Biomechanical Analysis of Service Motion in Tennis

다국어 초록 (Multilingual Abstract)

The purpose of this paper is to select 7 male athletes and female athletes of high school, and to compare their active potential differences of trunk muscle according to service motion of tennis. This paper also measures the duration time, and angular velocity of tennis service kinematic variations using Kwon3D(1993) program. When we generalize the change pattern of each variation through normalization process, the results obtained are as follows:
1. In the accumulative distribution rate of trunk muscles in service movement, male athletes show higher muscle active potential in the first service and female athletes show higher muscle active potential in the second service.
2. The ball speed of these athletes after an impact with the racket head is much slower compared with that of the world-famous athletes but of the proper flexsor and extensor of lower limbs, trunk, upper arm, forearm, and racket head are linked properly in sequence, biomechanical efficiency can be obtained in dong powerful service.
3. The angular velocity of wrist joint is much slower compared with that of the world-famous athletes, and this result is thought to be due to improper coordinated movement of the timing and rhythm in upper limb and trunk.
4. The great deviation of angular velocity in elbow joint among male athletes is due to the degree difference of using t he elbow joint.
5. The deviation of angular velocity in shoulder joint is also due to the improper coordinated movement and this keeps athletes from doing powerful service.