| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
In this study, we analyzed the motion of the upper extremity and trunk of baseball pitchers during pitching. We clarified the relationship between the pitching motion and the spin of the thrown ball. The analyzed data suggested; (1) in comparison with four-seam fastballs, breaking balls can be classified into 3 groups; (2) one of the 3 groups, which includes the types of pitches with different direction of spin axis, equivalent spin rate, and slower ball speed compared with four-seam fastballs (e.g., slider, cutter, and curveball), was thrown by adjusting the angle of forearm supination just before the release, and (3) the inter-day variability in forearm supination angle and the direction of spin axis was observed even when the pitchers threw the same pitch type. These findings would be applicable for the training and conditioning programs for baseball pitchers.
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