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Utilizing hierarchical redundancy for accurate throwing movement.

Nobuyasu Nakano1, Yoichi Iino2, Yuki Inaba3

  • 1National Institute of Advanced Industrial Science and Technology, Chiba, Japan.

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Summary
This summary is machine-generated.

Basketball players improve free-throw accuracy by reducing motor variability. Interjoint coordination enhances ball release reproducibility, crucial for performance, more than fine-tuning coordination itself.

Keywords:
CoordinationRelease parameterSports biomechanicsThrowingVariability

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Area of Science:

  • Biomechanics
  • Motor Control
  • Sports Science

Background:

  • Understanding motor variability reduction in redundant tasks is key for sports performance and human motor control.
  • Few studies have simultaneously investigated hierarchical redundancies in athletic tasks like basketball free-throw shooting.

Purpose of the Study:

  • To clarify how experienced basketball players utilize ball-level and body-level redundancies for accurate free-throw shooting.
  • To simultaneously examine the use of hierarchical redundancies in basketball free-throw execution.

Main Methods:

  • Employed a motion capture system with experienced basketball players (intermediate and top-level).
  • Utilized solution manifold, tolerance, noise, and covariation analysis for ball-level redundancy.
  • Applied uncontrolled manifold analysis and covariation by randomization for body-level redundancy.
  • Compared performance under feedback (FB) and no-feedback (NF) conditions.

Main Results:

  • Ball-level analysis showed noise and covariation components related to performance, with noise having a larger impact.
  • Reproducibility of release parameters needs more improvement than coordination.
  • No significant difference in release parameter coordination between FB and NF conditions.
  • Body-level analysis demonstrated interjoint coordination reduced longitudinal position variability of hand and fingertip.
  • Interjoint coordination improved ball-release position reproducibility, particularly in performance-critical directions.

Conclusions:

  • Interjoint coordination enhances the reproducibility of ball-release parameters, leading to improved motor performance in basketball free-throw shooting.
  • The reproducibility of release parameters offers a greater opportunity for performance enhancement compared to coordination adjustments.