Hamid, Fatima. “The Effect of Interval Training Is High Intensity in Some Functional Indicators and the Achievement of an Enemy 800 Meters Youth”. Journal of Physical Education 29, no. 1 (March 28, 2017): 298–309. Accessed June 30, 2026. https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1098.