The researchers aimed: to identify the values of the electrical activity of the working muscles, their contribution ratio and the thrust indicators of the distinguished and medium group during the performance of the two tests (wide jump - vertical jump) for the sample under research, the average values of some biomechanical indicators for the distinguished and medium group during the performance of the two tests (wide jump - vertical jump) for the sample under investigation. The two researchers used: the descriptive approach based on mechanical analysis and electrical activity of the muscles and the strength measurement platform, the research sample included: 6 high jump players at different levels registered in the Egyptian Federation for Athletics. Among the most important results: The performance of the wide jump depends on the stability of the rectus femoris muscle, where it recorded the largest electrical activity. The performance of the vertical jump depends on the rectus femoris muscle and the tibial muscle, where it recorded the largest electrical activity. The maximum thrust in the vertical jump test reached a value of (3217) Newton And the lowest value in the wide jump test with a value of (2430) Newtons for the distinguished level, with a difference of (787) Newtons, which indicates that more force is exerted in the vertical jump) again for the distinguished level The two researchers recommended: to be guided by the results that have been reached as values of muscle activity, their contribution ratios and mechanical thrust force, directing and paying attention to them during training leads to raising the level of performance of high jumpers, the use of electromyography (EMG) to determine the state of the muscles of high jumpers at different levels And its development through fine details that are difficult to notice with the naked eye, using the results of electromyography (EMG) in the preparation of training programs.