Q. Alkhashab, Z. and زهير . A comparative study in the controlling effect of (load & reiteration duration time) by physical exercises on a number of physical and skillful variables for young football players. Al-Rafidain Journal For Sport Sciences (RJSS). 17, 56 (), 1–21. DOI:https://doi.org/10.33899/rajsport.2011.6113.