Publications by authors named "Tetsuya Ijiri"

How do skilled players change their motion patterns depending on motion effort? Pitchers commonly accelerate wrist and elbow joint rotations via proximal joint motions. Contrastingly, they show individually different pitching motions, such as in wind-up or follow-through. Despite the generality of the uniform and diverse features, effort-dependent effects on these features are unclear.

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Motor executions alter sensory processes. Studies have shown that loudness perception changes when a sound is generated by active movement. However, it is still unknown where and how the motor-related changes in loudness perception depend on the task demand of motor execution.

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Article Synopsis
  • - The study analyzed how the accuracy and consistency of baseball pitchers' pitches vary across different age groups: elementary school, junior high, high school, and college students.
  • - Results indicated that while pitching precision improved with age, the variability in form (measured by minor axis length of error ellipses) varied significantly, especially in younger pitchers.
  • - Notably, younger pitchers showed a strong correlation between the variability of their throwing arm's trajectory and their performance, suggesting greater inconsistency compared to older groups.
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In rapid interceptive actions such as hitting a baseball, cricket ball or tennis ball, ball speed varies between trials, and players have to compensate the time lag by controlling the moment of movement onset and movement duration. Previous studies have found that these two variables can flexibly co-vary and are robustly influenced by target speed (i.e.

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