Funato Yuta, Nakashima Hirotaka, Sakurai Shinji
Graduate School of Health and Sport Sciences, Chukyo University, Toyota, Japan.
Department of Sport Science and Research, Japan Institute of Sports Sciences, Tokyo, Japan.
Front Sports Act Living. 2025 Sep 1;7:1643241. doi: 10.3389/fspor.2025.1643241. eCollection 2025.
Athletic performance in competitive ski jumping is evaluated based on the aggregate scores of the jump distance and flying style. However, an understanding of how angular momentum influences performance, particularly during the approach to takeoff phases, is lacking. Therefore, this study aimed to quantify the angular momentum during the takeoff motion on a medium hill and to examine the appropriate angular momentum.
The study participants included 21 jumpers (16 males and five females; height: 1.65 ± 0.09 m; total weight: 54.6 ± 8.9 kg; age: 19.2 ± 6.8 years) performing on a medium hill. The angular momentum of the center of gravity of the jumper + ski system (AM) at takeoff was filmed at 200 Hz using a high-speed camera and analyzed in the sagittal plane.
As a result of confirming the relationship between AM at takeoff and jump distance, a significant quadratic approximation curve was obtained, indicating that the value at the apex of the -axis was 0.0391 s ( < 0.05).
This study shows that the appropriate AM value at takeoff was approximately 0.0391 s. The study findings are expected to contribute to coaching with objective indicators.
竞技跳台滑雪的运动表现是根据跳跃距离和飞行姿态的综合得分来评估的。然而，目前尚缺乏对角动量如何影响表现的理解，特别是在起跳前阶段。因此，本研究旨在量化中坡起跳动作中的角动量，并探讨合适的角动量。
研究参与者包括21名在中坡进行跳跃的滑雪运动员（16名男性和5名女性；身高：1.65±0.09米；总体重：54.6±8.9千克；年龄：19.2±6.8岁）。使用高速摄像机以200Hz的频率拍摄滑雪运动员+滑雪板系统重心在起跳时的角动量（AM），并在矢状面内进行分析。
通过确认起跳时的AM与跳跃距离之间的关系，得到了一条显著的二次近似曲线，表明在y轴顶点处的值为0.0391秒（P<0.05）。
本研究表明，起跳时合适的AM值约为0.0391秒。研究结果有望为基于客观指标的训练指导提供帮助。
