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Description and Consistency of In-Game Pitching Kinetics' Relationship With Ball Velocity.

Kevin Giordano1, Adam R Nebel2, Benjamin Lerch2

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In-game baseball pitching shows inconsistent relationships between throwing arm kinetics and ball velocity, unlike lab studies. This research provides new normative kinetic data for pitchers.

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Area of Science:

  • Sports Medicine
  • Biomechanics
  • Kinesiology

Background:

  • Baseball pitchers frequently experience shoulder and elbow injuries.
  • Previous research on pitch velocity and upper extremity kinetics was confined to laboratory settings.
  • Advancements in markerless motion capture enable in-game biomechanical analysis of baseball pitching.

Purpose of the Study:

  • To establish normative data for in-game pitching kinetics.
  • To evaluate the associations between pitch velocity and shoulder/elbow kinetics during actual games.

Main Methods:

  • Retrospective analysis of in-game data from 183 college pitchers.
  • Utilized multilevel models to examine pitch velocity and kinetic relationships.
  • Employed intraclass correlation coefficients to assess intrapitcher kinetic consistency across multiple performances.

Main Results:

  • The intrapitcher relationship between throwing arm kinetics and ball velocity was not consistently strong across multiple outings.
  • Inclusion of random slopes did not significantly decrease intrapitcher kinetic variance.
  • Findings differ from previous laboratory-based studies regarding the intrapitcher relationship between kinetics and velocity.

Conclusions:

  • The relationship between pitch velocity and in-game throwing arm kinetics is less consistent than previously thought.
  • This study offers valuable normative in-game kinetic data for baseball pitchers.
  • Understanding these in-game biomechanics is crucial for injury prevention strategies.