野球バットの重心位置の変化がバットに加わる加速度に及ぼす影響

抄録

The important characteristics include the baseball bat's center of gravity, moment of inertia, length and mass when analyzing a baseball bat swing. The purpose of the present study was to investigate the effect of the center of gravity on bat's acceleration. An experimental bat was designed, which provided five conditions for the center of gravity. The knob of the experimental bat was equipped with accelerometers to measure the three liner and three angular components of acceleration applied to the bat. The subjects were trained four baseball players. These six components of acceleration were measured using the experimental bat for give conditions of the center of gravity. The bat center of gravity were found to affect linear and angular acceleration during bat swing. But, effects of the center of gravity is different of each player, and each player has permissible range for conditions of the center of gravity. Thus, it is necessary to consider the bat characteristic that suit each player and to analyze each batter's motion during bat swing.