Abstract: The research aims to study some biomechanical variables for discus throwers. Methods:, a three-dimensional analysis was performed using the Spector Skill analysis program, where the 3-dimensional biomechanical analysis was conducted using the analysis model of the whole body and the extraction of biomechanical variables and temporal analysis during the two moments of the shooting position, the beginning of the shooting, the force position and the moment of the shooting, due to its suitability to the nature of the study. The research sample The research sample was chosen by the intentional method, the number of 4 contestants and participants in the Republic Youth Championship under the age of 20 (cup) season 2022 AD, and those who won the first four positions, and the number of 3 attempts for each contestant was selected and subjected to analysis (age 18.20 ± 50 years, height 182.00 ± 43 cm, weight 92.14 ± 8. kg, training age 4.56 ± 16) The 3D imaging was conducted using (2) Go Pro Hero (6) and Go Pro Hero (5) cameras, set at a frequency of 120 frames per second and subjected so that Camera (1) vertical to the left of the thrower during the disposal and throwing position, 5 meters away from the circle, and camera (2) placed behind the circle and perpendicular to the body of the player during standing in the preliminary stage, 5 meters away from the middle of the circle, and the two cameras are at a height of 1.20 meters, the photography was conducted For the throws of the Republic Championship for adults, the 2022 season, in the Olympic Center in Maadi, and the processing procedure for the best three attempts for the first-place owners. Figure (1) Camera lenses. Calibration was performed using a 1 x 1 x 1 meter three-dimensional calibration box inside the shooting circle. Results: The existence of a direct significant correlation between the variables of the tangential velocity of the center of gravity of the tool and the vertical velocity of the center of gravity of the shooter and the summed velocity of the center of gravity of the shooter during the two moments of the start of the l shooting and the shooting distance with the throwing distance of the research sample.. Recommendations: The use of different measurement methods to evaluate the performance of the discus competition plays a crucial role in understanding and analyzing the timing of using the muscles of the body in an effective instantaneous synchronization in the competition.