BRIEF RESEARCH REPORT article
Front. Sports Act. Living
Sec. Sports Coaching: Performance and Development
Volume 7 - 2025 | doi: 10.3389/fspor.2025.1643241
Analyzing Angular Momentum in the Takeoff Phase of Medium-Hill Ski Jumping
Provisionally accepted
- 1Chukyo University, Nagoya, Japan
- 2Kokuritsu Sports Kagaku Center, Kita, Japan
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Introduction: 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. Methods: 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 (AMCG) at takeoff was filmed at 200 Hz using a high-speed camera and analyzed in the sagittal plane. Results: As a result of confirming the relationship between AMCG at takeoff and jump distance, a significant quadratic approximation curve was obtained, indicating that the value at the apex of the X-axis was 0.0391 s -1 (p < 0.05). Discussion: This study shows that the appropriate AMCG value at takeoff was approximately 0.0391 s -1 . The study findings are expected to contribute to coaching with objective indicators.
Keywords: angular momentum, coaching, ski jumping, medium hill, takeoff phase
Received: 08 Jun 2025; Accepted: 04 Aug 2025.
Copyright: © 2025 FUNATO, Nakashima and Sakurai. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: YUTA FUNATO, Chukyo University, Nagoya, Japan
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