抄録
The purpose of this study is to report "the circulatory disturbances in the fingers of baseball players", and to analyze those of the tendency and the rate of incidences as each area by the administration of a questionnaire. It also researches the influences of external environments of the position, the practice, and the temperature and so on. The questionnaires were conducted on 274 players belong to the baseball club of 6 high school attached to Tokai University. According to questionnaires, 76 players (27.7%) were aware of circulatory disturbances in their fingers. The circulatory disturbances in the fingers is caused by the hyperextension of the throwing fingers as the repetition of throwing performance and the mechanical stress of catching the ball as the repetition of catching performance. As a characteristic of positions, the catchers and the infielders tend to be aware a tingling and numbness in their catching index fingers, the pitchers throw with index and middle fingers. The various factors such as their position, practice time, teaching technique seem to be relative causing the appearances of circulatory disturbances in the fingers, but air temperature didn't seem to be related.
