소프트볼 좌타자들의 효율적인 타격을 위한 운동역학적 분석

Abstract

Here are the following results of the kinematic analysis for a left handed softball batter. For an efficient left handed softball bat, the total moving time of the center of mass (COM) must not be fast and the sliding time must be reduced and the movement slow. Also for accurate impact, the follow through swing must be fast, the nose movement up and down is approximately 2cm and the stride length is about 70cm. During the stride the COM movement in the vertical plane needs to be minimized and lower the players body. From the impact to the follow through phase the right leg must be maximally extended so that maximum COM velocity can be increased. The maximum bat speed must arise before the impact and the orientation must be so that the small side contacts with the ball. The trunk angle is about 90 degrees, the wrist angle is about 80 degrees and it must not be un-cocked until after impact. At impact the left knee must be flexed to support the body until the follow through swing where the right leg must be fully extended to maintain a posture to increase the torque. At the take back point the left foot must be focused on and pulled in towards the body while at the impact point the left foot pushes the ground ensuring a strong torque. Finally the right foot pushing towards the home plate while there is maximum knee extension and by the left foot axis the trunks torque must be used to increase the efficiency and power for batting.