The master's thesis presented by the researcher/Islam Mohamed Mohamed Hussein, resident of the Department of Sports Training and movement sciences, titled "Ratios of the contribution of certain physical, morphological and physiological variables and their relationship to the effectiveness of the skill and tactical performance of the football youth in Method 4-4-2  "On Monday, 3/9/2018, at 1 pm  "Dr. Mohamed Ra'fat Mahmoud in the college