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Positional relationship between ball and fingers for accurate baseball pitching.

Ayane Kusafuka1, Kohei Nishikawa2, Naoki Tsukamoto2

  • 1Department of Intermedia Art and Science, Faculty of Science and Engineering, Waseda University, Tokyo, Japan.

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Summary

Consistent finger positioning before acceleration peaks is key to reducing release angle variability in baseball pitching. This improved accuracy in throwing can lead to more consistent pitch locations.

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Area of Science:

  • Biomechanics
  • Motor Control
  • Sports Science

Background:

  • Accurate throwing is a complex human motor skill crucial in sports like baseball.
  • Reducing release angle variability is vital for consistent pitch location in baseball pitching.
  • Previous research highlights hand and finger roles, but detailed analysis of their link to release angle variability is lacking.

Purpose of the Study:

  • To investigate the relationship between the positional relationship of the ball and fingers and the variability of the release angle.
  • To identify specific finger movements or positions that correlate with reduced release angle variability.

Main Methods:

  • Utilized automatic image recognition technology based on deep learning to capture precise finger positions relative to the ball.
  • Analyzed the positional relationship between the ball and fingers during the throwing motion, focusing on the pre-acceleration phase.
  • Correlated finger positions with the variability of the ball's release angle.

Main Results:

  • A significant correlation was found between lower middle finger positions prior to acceleration peaks and reduced release angle variability.
  • Consistent finger positioning in the pre-release phase is associated with more stable release angles.
  • This specific finger positioning appears to enhance robustness against spatial variations in ball movement.

Conclusions:

  • The precise positioning of the lower middle finger before the acceleration peak is critical for minimizing release angle variability in throwing.
  • Emphasizes the importance of consistent finger placement during the pre-release phase for achieving accurate and repeatable throwing performance.
  • Findings suggest a novel approach to improving throwing accuracy through targeted motor control strategies focusing on finger positioning.