Abstract: the aim: This research aims to study the biomechanical support during running in a bende followed by a straight line and to try to identify the requirements of the different forces affecting the support, as well as to identify the times of support at the moment of touching the ground, in addition to the position and direction of the stride of the foot on the ground. This is what prompted the researcher to identify the most important variables of support in the running stride in a bend and a straight line and the differences between them and the nature of the direction of the stride of the foot when running in a bend and a straight line. methods: The researcher used the descriptive approach with the help of kinetic analysis tools and means. The study sample consisted of 2 runners who were chosen from Al-Ahly Club (weight 77±0.12, 76±0.79 kg, height 180±0.03, 178±0.41 cm, age 19±0.81, 19±0.96 years). Each runner ran 3 attempts for the 60m race in bend and straight lines. The best attempt in time was chosen to be analyzed. Two-dimensional photography was done using 2 Go Pro cameras at a frequency of 125 frames/second. The biomechanical measurement and analysis process was carried out using the kinetic analysis program. “Simi Motion”. Calibration was done for both cameras The results: There are biomechanical differences in the running stride in bend and straight lines, and this appears in the touch time, take off time, and stride length.. Recommendations: It is necessary to focus on running technique training to master every stage of the running step, whether in a straight line or a bend. Keywords: bend, straight