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Related Experiment Video

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Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography

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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.

Keywords:

elbow injury pitch count wearables

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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.