Hussein, Hussein Ali. “The Effect of Strength Training on Blood Levels of (lysine and Valine) in Tennis Players”. Journal of Physical Education 38, no. 1 (March 27, 2026): 1613–1622. Accessed July 1, 2026. https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/2414.