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Finger release sequence for fastball and curveball pitches.
Canadian Journal of Applied Sport Sciences. Journal Canadien Des Sciences Appliquees Au Sport
|March 1, 1985
Summary
Pitchers release fastballs with the thumb initiating the action, followed by the index and middle fingers. Curveball releases show varied finger sequences, with thumb-first being most common.
Area of Science:
- Biomechanics
- Sports Science
- Motor Control
Background:
- Understanding the precise mechanics of pitching is crucial for performance enhancement and injury prevention.
- The role of individual finger actions during ball release in baseball pitching remains incompletely understood.
Purpose of the Study:
- To investigate and quantify the sequential action of the thumb, index, and middle fingers during the release of fastballs and curveballs.
- To identify significant differences in finger release timing between pitch types.
Main Methods:
- Utilized custom micro-switches on fingers and electroconductive paint on the ball to record precise timing data (10^-4s accuracy).
- Initiated timing with stride foot contact and concluded with ball reception in the catcher's glove.
- Analyzed data from 103 fastball and 88 curveball trials from nine college pitchers.
Main Results:
- For fastballs, the thumb consistently preceded the middle and index fingers by ~6 ms (p < .001) in 91.1% of trials.
- No significant timing difference was observed between the middle and index fingers during fastball release.
- Curveball releases showed a dominant thumb-middle-index sequence (72.7%), with a notable thumb-first pattern in 5 out of 9 pitchers (p < .001).
Conclusions:
- The thumb plays a distinct initiating role in fastball release mechanics.
- Finger release sequences for curveballs are more variable than for fastballs, suggesting different biomechanical strategies.
- These findings offer insights into pitching biomechanics that could inform training and technique development.