The research aims to identify the most important indicators of electrical activity of the muscles of the foot of the support for the skill of the long jump and the skill of the high jump during the take-off phase, to identify the relationship between the indicators of electrical activity of the muscles of the foot of the support for the skill of the long jump and the skill of the high jump during the take-off phase, the researcher used the descriptive method using biomechanical analysis based on the electrical activity chart of the muscles EMG, the research sample was selected intentionally represented by players from Al-Ahly Club and Maadi Club registered in the Egyptian Athletics Federation, and the research sample was selected intentionally and the most important results were at the moment of damping, the "lateral gastrocnemius muscle" contributed by a contribution rate of (36.13%) and was ranked first for the skill of the long jump, and at the moment of leaving the ground, it contributed The "lateral gastrocnemius" muscle contributed (44.055%) and was ranked first in the long jump skill. At the moment of damping, the "rectus femoris" muscle contributed (34.2%) and was ranked first in the high jump skill. At the moment of leaving the ground, the "rectus femoris" muscle contributed (38.7%) and was ranked first in the high jump skill.