Wissam Shaker Razig, I. R. M. S. A. M. . “The Effect of Endurance Training on Some Functional and Physical Variables and the Digital Level of Middle Distance Running”. Annals of the Romanian Society for Cell Biology, vol. 25, no. 6, May 2021, pp. 3395-07, https://www.annalsofrscb.ro/index.php/journal/article/view/6069.