Effect of the modified FIFA 11+ program on development some physical abilities and the skillful level for junior field hockey  DR. Mohamed Ahmed Abdalla Ibrahim  Dr. fathi Mansour Mohamed Naji The research aims to study the effect of of Modified FIFA 11+ program as an organized and comprehensive warm-up process on the development of some specific physical abilities and the level of skillful performance of field hockey juniors under 16 years old. The researchers use experimental methodology with two groups design (experimental and control) and pre-post measurements, The research sample was chosen in Purposive method and included a number of (30) hockey juniors under 16 years old at Al-Sharqiya Sports Club. A number of (8) juniors from the same research community and outside the basic research sample from the Muslim Youth Club to conduct the exploratory study and scientific transactions. The researchers added the modified FIFA 11+ program (8 weeks, with three training units per week) as a warm-up within the main training program for the experimental group. The most important conclusions were that the FIFA 11+ program positively affects the development of some special physical traits and the level of skill performance for field hockey juniors under 16 years old. 16 years. In favor of the experimental group, the researchers recommend using the modified FIFA 11+ program to improve the special physical abilities and skill level of field hockey juniors and compare its effectiveness on preventing injuries between genders and different age groups.