The purpose of this study was to reveal how professional baseball players were trained while they were amateur baseball players, and to examine ways to improve the problems faced by amateur baseball players. A survey of 300 professional baseball players was conducted.
    There were a lot of problems revealed in amateur baseball: “overwork and injury because of irrational, inefficient, and too long training” , “manner of the instructors” , “balance among baseball, studying, and playing” , and “violence to the players” . These results suggested that most professional baseball players wanted it to be done in a different way from their own experience, and that they had a strong awareness of the problems of traditional training.