期刊名称：International Journal of Sport and Health Science
印刷版ISSN：1348-1509
电子版ISSN：1880-4012
出版年度：2022
卷号：20
页码：66-75
DOI：10.5432/ijshs.202127
语种：English
出版社：日本体育学会
摘要：This study aimed to investigate how high school baseball pitchers throw different pitch types with attention to the ball kinematics, to reveal the kinematic characteristics of each pitch type, and to reveal whether the relationship between the speed and spin rate of fastballs thrown by high school pitchers is different from that of fastballs thrown by collegiate, semiprofessional, and professional pitchers (mature pitchers). Eighteen high school baseball pitchers were asked to throw all the pitch types they would normally throw in a game. Among all pitches, this study specifically focused on fastballs, changeups, sliders, and curveballs. First, the kinematics of balls thrown by high school pitchers were compared between each pitch type. Second, the ball kinematics of each pitch type observed in this study were compared with those observed in previous studies investigating mature pitchers. Third, the relationship between the speed and spin rate of fastballs observed in this study was compared with that observed in previous studies. As a result, it was revealed that high school pitchers could throw different pitch types by changing the speed, spin rate, and/or spin axis. In addition, it was indicated that high school pitchers threw different sliders and curveballs compared to mature pitchers. On the other hand, in this study, it could not be asserted that high school pitchers threw different fastballs compared to the mature pitchers. It was revealed that the relationship between the speed and spin rate of fastballs for high school pitchers is similar to that for mature pitchers.
