The research aims to designing A training program for changing into a standby position (right . left) during attack and Identifying its impact on performance level for junior boxers, the researcher chose the experimental method using the experimental design with pre and post measurements on one experimental group, the research sample was chosen intentionally form the junior of menoufia area that consists of (22) junior boxers, who were divided to the experimental research sample that consisted of (12) junior boxers, taking into account that half of them are a right boxers and the other half are left-handed boxers, to implement the proposed training program, and survey study sample, that consisted of (10) junior boxers to calculate the scientific coefficients for the tests used in the research ,The training program led to development of the performance level for junior boxers with left and right positions by relying on them to changing into a standby position (right . left) during attack, which helps the boxer to verify the attack performance during the various playing positions on the ring.