Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Investigation of Biomechanical Factors in Track and Field Javelin Performance: A Multidimensional Analysis of Predictive Variables through Multiple Regression Analysis

육상 창던지기 기록에 미치는 운동학적 요인의 탐색: 다차원적 다중회귀를 활용한 성과 예측 변수 분석

  • Ho-Jong Gil (Fila Advanced Science and Technology Center, FILA Holdings) ;
  • Jin Joo Yang (Prosthetics and Orthotics Center, VHS Medical Center) ;
  • Jong Chul Park (Department of Marine Sport, Pukyoung National University) ;
  • Young Sun Lee (Department of Physical Education, Korea National Sport University) ;
  • Jae Myoung Park (Department of Youth Guidance and Sport Education, Korean National Sport University)
  • Received : 2023.11.24
  • Accepted : 2023.12.08
  • Published : 2023.12.30
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Abstract

Objective: The purpose of this study is to investigate the effects of human motion and javelin kinematics during the energy transfer in javelin throwing on records, and to provide evidence-based training insights for athletes and coaches to enhance records. Method: Three javelin throw athletes (age: 22.67 ± 0.58 years, height: 178.33 ± 7.37 cm, weight: 83.67 ± 1.15 kg) were recruited for this study. Each athlete attempted ten maximum record trials, and the kinematic data from each performance were analyzed to determine their influence on the records. The Theia3d Markerless system was used for motion analysis. Results: Key factors were modeled and identified at each moment. In E1, main variables were COM Y (𝛽 8.162, p<.05) and COM velocity Z (𝛽 -72.489, p<.05); in E2, COM X (𝛽 -17.604, p<.05); in E3, COM X (𝛽 -18.606, p<.05), COM velocity Y (𝛽 38.694, p<.05), and COM velocity X (𝛽 66.323, p<.05). For the javelin throw dynamics in E3, key determinants were Attitude angle and Javelin velocity in the Y-axis. Conclusion: The study reveals that controlled vertical movement, center of mass management during braking, and enhanced pelvic rotation significantly improve javelin throw performance. These kinematic strategies are critical for record enhancement in javelin throwing.

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References

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