| Project/Area Number |
16K16540
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Sports science
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| Research Institution | Niigata University of Health and Welfare |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 水泳 / PIV / モーションキャプチャ / 筋電図 / 圧力 / 回流水槽 / 水中運動 / 流体 / コーチング |
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| Outline of Final Research Achievements |
We have developed a new method for three-dimensionally visualizing the flow around the swimmer's hand and foot using Particle Image Velocimetry (PIV) used in the field of fluid dynamics. Using this method, the swimmer's propulsion mechanism was investigated, and the swimmer performed complex limb-movements such as changing the stroke direction or rotation of the limb in the water, and this movement generates a vortex around the limb, It is suggested that this vortex may be the source of propulsion. Also, this vortex reflects the magnitude of the propulsive force, so if the method of this study is developed, it will be possible for the swimmer to estimate the degree of force obtained from the water.
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| Academic Significance and Societal Importance of the Research Achievements |
これまで、水泳の腕のかきのことを「水を押す」と表現されていたが、実際には押しておらず渦を作り出して手足の周りに圧力差を生み出し、スイマーはこれを推進に利用して遊泳している。ヒトが速く泳ぐためには、作用反作用のように力任せに水を押せば進めるのではなく、渦をどうやって作るかがカギとなり、水泳指導法のパラダイムシフトにつながる。
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