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Quantitative comparison of technical differences in baseball batting motion by motion analysis

In this paper, batting motions between expert baseball players and beginner players are quantitatively compared and discussed, based on Kinetic and Kinematic analysis methods by using bio-instrumentation systems. We measure batting speed, center-of-gravity movements, a rotating angle of body trunk axis and a ground reaction force as kinematic data, and muscles power of the lower limb as kinetics data by using two force plates and the motion capturing system. Comparing these data, we extract Kinematics-based and Kinetics-base comm.-on features of each expert player, respectively.