Background: The aims to study the effect of the circuit training program on improving the digital level of junior middle distances (800 m) in athletics. The sample was chosen intentionally from the middle-distance track and field athletes from the juniors of Al-Arish Sports Club, numbering (10) juniors. Results shows that differences between the pre- and post-measurement of the experimental group in the time to complete the (800) meter race. The significance of the differences between the pre- and post-measurement of the experimental group in the stride length of the (800) meter players.