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Hamid J A K, Salama O A, Sadiq A J, zohear A, Jasim T A, Ismaeel S A. Three-Dimensional Quantitative Analysis of Kinematic Variables in Discus Throwing Performance. J Sport Biomech 2025; 10 (4) :310-322
URL: http://biomechanics.iauh.ac.ir/article-1-355-en.html

Objective Three-dimensional kinematic analysis of discus throwing enables a more precise evaluation of movement patterns, displacement, velocity, and acceleration, which are essential for optimizing performance. This study aims to examine key kinematic variables during the final phase of the discus throw and analyze their relationship with athlete performance.
Methods This descriptive study was conducted on six discus throwers under the age of 20. Each athlete performed three attempts, resulting in a total of 18 observations per variable. Kinematic data were extracted using the APAS motion analysis system and high-speed video recording. Key variables included body displacement, angular velocity, acceleration, and phase duration during the throw. Pearson correlation analysis was used to assess the relationships between these variables and throwing performance.
Results The results demonstrated a significant correlation between body displacement, angular velocity, acceleration, and throwing distance (p < 0.05). Increased displacement range led to improvements in velocity and acceleration, ultimately enhancing throwing distance. Additionally, optimal movement coordination, particularly in controlling the center of mass and effective force transfer, played a crucial role in improving throw efficiency.
Conclusion Three-dimensional kinematic analysis provides valuable insights into the biomechanical efficiency of discus throwing, aiding in the identification of movement deficiencies and technical adjustments. The findings of this study emphasize the importance of utilizing 3D motion analysis in training programs and suggest that this tool be implemented to optimize athlete performance at professional levels.