Kherrachi , Toufik, and Salim Akezouh. “The Effect of a Running Program on the Weight and VO2max of U19 Football Players - Study Carried Out by the Polar System During the Interruption Period Caused by the Covid-19 Pandemic”. Sports Creativity, vol. 12, no. 01, Dec. 2025, pp. 554-7, https://journals.univ-msila.dz/index.php/JOSC/article/view/1371.