野球の投球運動における反復法を用いたスピードトレーニングの適正投球数

概要

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The purpose of this study was to investigate the proper number of pitches for speed training by using the repetition method in baseball pitching. Seventeen college baseball players (eleven pitchers, six fielders) were required to pitch the ball 100 times as fast as possible. The ball speed (initial velocity) of each trial was measured using the speed radar gun. The speed radar gun was placed at distance of 22.0m from the subject (the center height was 1.6m) on the extension of the pitcher's plate and the home base. As the result, in the range from 45 to 71 pitches, thirteen subjects showed "the inflection point of the ball speed" that means the beginning of decline tendency in the ball speed with increasing the number of pitches. In each group of the pitchers and the fielders, the subject who can exert the higher ball speed tended to reach that point earlier. However, the fielders group reached that point in earlier or similar number of pitches, even if the ball speed was lower than the pitchers group. These results suggest that the number of pitches before reaching the inflection point might to be the proper number for speed training in baseball pitching and that number might depend on the ball speed level and the usual training condition of the players.
仙台大学の論文