Quantitative Comparison of Technical Differences in Baseball Batting Motion by the Motion Analysis

Abstract

In this paper, for quantitatively comparing batting motions of Non-expert and of expert baseball players, motion analysis methods using several bio-instrumentation systems are discussed. In this analysis, at first, all member of baseball club are devided into expert players or Non-expert players by the manager of the high school baseball club members. Next, a batting speed, a center-of-gravity movements, a rotating angle of body trunk axis of players and a ground reaction force are measured by two force plates and ten high-speed cameras within motion capturing systems. By analyzing and processing statistically these data, a common feature of expert players is extracted.