الملخص

The aim of this study was to investigate the kinematic differences between the right and left sides in the motion trajectory of the weight during bench press in advanced weightlifters. Additionally, the study aimed to compare the motion trajectory of the bench press between the standard and wide grip distances for advanced weightlifters. The study assumed the following: Significant differences in the kinematic variables of the weightlifting motion trajectory between the standard and wide grip distances in the bench press section in favor of the standard distance for advanced weightlifters. Variability in the motion trajectory of the bench press between the standard and wide grip distances for advanced weightlifters. The research was conducted in the following scope: Human subjects: Advanced weightlifters. Spatial location: Al-Fatwa Sports Club in Mosul. Timeframe: From September 4, 2021, to February 4, 2023. The researchers employed a descriptive and analytical comparative methodology suitable for the nature of the study. The research sample consisted of five advanced weightlifters who were intentionally selected from the advanced weightlifters in Nineveh Governorate. The researchers used measurement, testing, questionnaires, and scientific technical observation. Data were recorded using three video recording devices at a speed of 240 frames per second (AKASO v50 elite) placed at a height of 97 centimeters and a distance of 316 centimeters in the right, left, and front directions. The data were statistically processed using mean, standard deviation, t-test for paired samples, and percentages using the statistical package SPSS v26. The study results revealed the following: There were significant differences (2) in the speed of the weight between the standard and wide grip distances, and these differences were shared in the bench press section for advanced weightlifters. There was no significant difference in the shape of the motion trajectory of the weight, except for the hook arc of the motion trajectory for the wide grip, which was superior at the point of weight fixation in the squat position. The motion trajectories for the standard and wide grips were equal at the highest weight elevation, and there was a wider deviation of the weight in the pulling .