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Preseason Workload in Collegiate Baseball Pitchers
Bennett Tabaracci1, Shraddha Sudhir2, Matthew Gauthier2
1Physical Therapy University of Southern California.
International Journal of Sports Physical Therapy
|February 5, 2025
Summary
Baseball pitchers experienced high acute to chronic workload ratio (ACWR) during preseason, indicating a need for progressive load management. Monitoring throwing workload is crucial for preventing overuse injuries in baseball pitchers.
Area of Science:
- Sports Medicine
- Biomechanics
- Epidemiology
Background:
- Upper extremity injuries are prevalent in baseball, particularly during the preseason.
- Current guidelines for throwing volume lack specificity for preseason workloads in pitchers.
- There is a need to quantify throwing workload and its associated risks during baseball preseason training.
Purpose of the Study:
- To quantify the total number of throws and the associated workload in collegiate baseball pitchers during the preseason.
- To define and measure pitching workload using angular velocity and acute to chronic workload ratio (ACWR).
Main Methods:
- A descriptive epidemiology study involving nine collegiate baseball pitchers.
- Inertial measurement units (IMUs) captured forearm velocity during all preseason throws.
- Workload was calculated using median angular velocity, total throws, and rolling averages for acute and chronic loads (ACWR).
Main Results:
- Pitchers averaged 1990.6 throws per preseason with an average angular velocity of 1686.2 m/s.
- Acute workload significantly decreased in Week 4 compared to Weeks 2 and 3.
- The acute to chronic workload ratio (ACWR) exceeded 1.27 for four weeks, with a significant reduction in Week 4.
Conclusions:
- High ACWR values during most of the preseason suggest a potential need for reduced and progressive workload management.
- Monitoring throwing workload during the preseason is recommended for clinicians to mitigate the risk of chronic overuse injuries in baseball pitchers.
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