Publications by authors named "Ayane Kusafuka"

Accurately throwing an object to a target position repeatedly is one of the specific human motor skills. The final arrival position of a thrown ball can be determined by its physical state at release. In baseball pitching, reducing the variability of the velocity angle of the ball at release (release angle) is important for reducing the variability of the pitch location.

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Repeated and accurate throwing of an object to a target position is a special human motor skill. It is particularly important to understand accuracy, which has received less attention than speed due to difficulties in measurement. Accuracy has been studied in terms of reducing errors against a single target, but also in terms of distinguishing appropriate throws for targets in different positions.

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Humans can move objects to target positions out of their reach with certain accuracy by throwing or hitting them with tools. However, the outcome-the final object position-after the same movement varies due to various internal and external factors. Therefore, to improve outcome accuracy, humans correct their movements in the following trial as necessary by estimating the relationship between movement and visual outcome (visuomotor map).

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Article Synopsis
  • Skilled individuals often manage to maintain high accuracy in fast movements, despite the usual tradeoff between speed and accuracy.
  • The study investigated how baseball pitchers achieve accuracy through two strategies: reducing variability in individual parameters and coordinating different parameters to balance their variations.
  • Results indicated that there was no significant coordinated covariation in release parameters affecting pitch location, suggesting that individual parameter consistency is crucial, especially as pitching speed increases.
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Article Synopsis
  • - This study focused on identifying key mechanical factors that affect the accuracy of baseball pitching, specifically examining the "release parameters" at the moment the ball is thrown.
  • - Results showed that the elevation pitching angle and ball speed are crucial for vertical pitch location, while the azimuth pitching angle primarily affects horizontal pitch location.
  • - The research concluded that pitching angles have the most significant impact on pitch location, with variations in these parameters differing among individual pitchers, ultimately contributing to our understanding of skills required for accurate ball control in pitching.
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