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The Development and Preliminary Validation of a Rhythmic Jumping Task for Coordination Assessment: A Task Design
Runjie Li1, Tetsuya Miyazaki1,2, Tomoyuki Matsui2,3
1Doctoral Programs of Biotechnology, Graduate School of Science and Technology, Kyoto Institute of Technology, Hashikami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Journal of Functional Morphology and Kinesiology
|July 23, 2025
Summary
Understanding upper-lower limb coordination is key for athletes. This study identified specific task features, like rhythmic asynchrony, that increase coordination difficulty, paving the way for better assessment tools.
Area of Science:
- Biomechanics and Motor Control
- Sports Science and Performance Analysis
Background:
- Effective upper-lower limb coordination is critical for athletic performance.
- Structural factors influencing inter-limb coordination difficulty are not well understood.
- Limited research systematically analyzes task components like directional congruence and rhythm structure.
Purpose of the Study:
- To identify structural factors affecting upper-lower limb coordination task difficulty under rhythmic constraints.
- To assess the potential of Rhythm Jump tasks for future coordination assessments.
Main Methods:
- Eighty-six male high school baseball players performed six Rhythm Jump tasks with varied limb movements.
- Performance was measured by full task success, partial success, and average successful series.
- A follow-up test assessed reproducibility and sensitivity to performance changes over one year.
Main Results:
- Task difficulty was significantly influenced by directional incongruence, static upper limb holding, and rhythmic asynchrony.
- Tasks with these features showed lower success rates.
- Some tasks exhibited moderate reproducibility and detected subtle performance changes over time.
Conclusions:
- Key structural factors contributing to coordination difficulty were identified.
- Rhythm Jump tasks show promise as a basis for developing practical inter-limb coordination assessment tools.
- Further validation is needed, but foundational evidence supports their application.
