Kinematics of throwing motion for attitude stabilization of the flying disc

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K19987
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 59020:Sports sciences-related
• Research Institution: Nanzan University
• Principal Investigator: Sasakawa Kei 南山大学, 人文学部, 准教授 (70646851)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: フライングディスク / 運動学 / 姿勢 / 角速度 / フォアハンドスロー

Outline of Final Research Achievements

A short pass by the forehand of a skilled thrower shows no changes in the attitude of the thrown disc and flies smoothly. However, with a beginner, the attitude of the disc does not stabilize in the air (flying and wobbling) and immediately falls down. Why the large changes in the attitude of the disc at release occurs only for unskilled throwers and how stabilizing the disc's attitude in the unskilled throwers has not been clarified. This study compared each nose-up/down angular velocity of the disc produced by each joint angular velocity of the throwing arm of skilled and unskilled throwers during the forehand short-throw. As result, among unskilled throwers, further facing the palm to throwing direction, increasing magnitude of palmar flexion velocity and adjusting the disc movement relative to the hands in the posterior tilt direction immediately before release could be the important factors for reducing the nose-down angular velocity of the disc at release.

Free Research Field

スポーツバイオメカニクス

Academic Significance and Societal Importance of the Research Achievements

初心者のフォアハンドショートスローにおける技術的な問題点をバイオメカニクスの観点から明らかにした本研究成果は初心者に対する新たな指導方法の構築や改善を可能にし、初心者のフォアハンドスローの習得をよりスムーズすることが期待される。また、これによってより多くの人がディスクスポーツに親しみやくすなり、身体を動かす楽しさの発見や再認識、生涯を通じたスポーツ活動への参加機会を増やすことにながると考えられる。