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Differences in PlayerLoad and pitch type in collegiate baseball players.
Garrett S Bullock1, Abigail C Schmitt2, Patrick Chasse3
1Arthritis Research UK Centre for Sport, Exercise and Osteoarthritis, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, UK.
Sports Biomechanics
|June 22, 2019
Summary
PlayerLoad, a measure of external training load, was higher for fastballs than changeups in collegiate pitchers. Pitch type influences workload, suggesting pitch counts alone may not reflect true player fatigue.
Area of Science:
- Sports Science
- Biomechanics
- Exercise Physiology
Background:
- PlayerLoad quantifies external training load using tri-axial accelerometers.
- Understanding pitch-specific demands is crucial for managing pitcher workload and preventing fatigue.
Purpose of the Study:
- To compare PlayerLoad (peak and sum) across different pitch types (fastball, curveball, slider, changeup) in collegiate baseball pitchers.
- To determine if pitch type influences the external training load experienced by pitchers.
Main Methods:
- Twenty-five collegiate pitchers wore tri-axial accelerometers (Optimeye S5) during pitching sessions.
- PlayerLoad was calculated for fastballs, curveballs, sliders, and changeups.
- Statistical analysis involved paired t-tests and effect size indexes to compare load metrics.
Main Results:
- Fastballs exhibited significantly higher peak and sum PlayerLoad compared to changeups.
- No significant differences in PlayerLoad were found between fastballs and curveballs or sliders.
- Fastball velocity was significantly higher than all other pitch types analyzed.
Conclusions:
- Pitch type significantly impacts external training load in collegiate pitchers.
- Reliance solely on pitch counts may underestimate pitcher fatigue due to varying biomechanical stress from different pitches.
- PlayerLoad offers a more comprehensive measure of pitching workload, considering the intensity of each pitch.
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