2023 Fiscal Year Final Research Report
Extracting and validations of tips for improving the performances via dynamic contribution analyses of double-handed vaulting, throwing, and hitting motions using instrumented equipment
| Project/Area Number |
20H04068
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 59020:Sports sciences-related
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| Research Institution | University of Tsukuba |
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Principal Investigator |
KOIKE Sekiya 筑波大学, 体育系, 教授 (50272670)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 両手操作 / 閉ループ問題 / 順動力学的貢献分析 / 因果関係 / コツ / シミュレーション / 運動方程式 / マルチボディ |
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| Outline of Final Research Achievements |
Sports motions, where the left and right upper limbs and equipment form a mechanistic closed-loop system, so that even if the motion of the equipment is measured, it is generally difficult to know the kinetics of each hand acts on the equipment. Therefore, the closed-loop solution and the forward dynamic contribution analyses were used to quantify the functional roles of joint torques to the generation of performance outputs in these movements. As a result, in the hammer throw, we determined the characteristics of the self-excited system play a significant role in the increase in head speed from the analyses based on the equation of motion of the system derived by a simplified modeling. In the pole vault and golf swing, instrumented grip handles with strain sensors were devised to solve the closed-loop problem for each hand kinetics, and a transformation function that also takes into account the time derivative of the strain signal was found to be effective in improving the accuracy.
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| Free Research Field |
スポーツバイオメカニクス
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| Academic Significance and Societal Importance of the Research Achievements |
これまでのバイオメカニクスの学問領域では，キネマティクス的変量やキネティクス的変量とパフォーマンスとの相関から，統計的にスポーツ動作の生成メカニズムを推察していたが，相関に基づく分析では，力学的なメカニズムを説明することはできなかった．本研究では，対象とする系の運動方程式が有する入力（関節トルク）と出力（パフォーマンス的指標）との因果関係を含む順動力学的な貢献分析を可能としたことによって，これまでのバイオメカニクス的な分析手法では扱うことができなかった複雑なスポーツ動作のメカニズムを明瞭化することを可能としている．
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