| Project/Area Number |
18K17787
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 59020:Sports sciences-related
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| Research Institution | Ibaraki Prefectural University of Health Science |
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Principal Investigator |
Ae Kazumichi 茨城県立医療大学, 保健医療学部, 特任助手 (30781538)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 野球打撃 / シミュレーション / 最適化計算 / パフォーマンス改善 / 標準動作 / Angle-driven / タイミング調整 / バット・ヘッドスピード / 逆動力学 / バイオメカニクス |
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| Outline of Final Research Achievements |
The objectives of this study were to 1) develop a simulation model of baseball batting utilising the standard motion and 2) explore optimal motions of the upper body to increase the bat-head speed. A ten-segment angle-driven simulation model consisting of a bat and upper body was driven using with the coordinate data of the standard motion from twenty-three male collegiate baseball players who performed tee batting. Two performance optimisations were conducted to increase the peak bat-head speed by changing values and timings (OPT1) or timing alone (OPT2) of the upper joint angular acceleration time history data.
In performance optimisations, the bat-head speeds increase from 35.6 m/s (measured data) to 40.0 m/s (OPT1) and 39.2 m/s (OPT2), respectively. The increases of the bat-head speed were achieved through changes of the barrel-side upper limb movements considerably.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究における上半身の動作を変化させることによってバット・ヘッドスピードが増加したという結果は，具体的な理論値を評価できるシミュレーション分析の有用性を改めて示したと考えられる．
打撃パフォーマンスを向上させるための力学的・理論的な知見を具体的に掲示できたことは，本研究の大きな成果の一つである．加えて，野球の打撃という複雑なスポーツ動作に対して，コンピューターシミュレーションを実施できたことは，野球打撃以外のスポーツ動作におけるパフォーマンス向上に関する知見の獲得にも大いに有効となるだろう．
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