Jassim, M. and Jawad , Z. (2012) “Study of procedures used to measure the energy spent running on the belt using mobile”, Journal of Physical Education, 24(1), p. 14. Available at: https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1862 (Accessed: 13 July 2026).