The research aims to identify the “Muscle strength contribution rates (fixed/explosive/animation) to the level of achievement in 100m Sprint — men. the researcher used the descriptive method (Surveys) which is suitable for the study nature, on a sample of first year students, faculty of physical education, Assiut University, New Valley Branch. The size of the main sample was 40 students. One of the major findings is: there is correlative relationship between the digital achievement level for 100m sprint-men and the muscular strength in three models (fixed, explosive, kinetic).