Jarjees, E. and Hamdoon, O. 2014. Impact of some aspects of muscle strength exercises in number of physical variables and the level of achievement for 50-meter freestyle swim for men. Al-Rafidain Journal For Sport Sciences. 20, 66 (Dec. 2014), 158–193. DOI:https://doi.org/10.33899/rajsport.2014.89593.