Employing the plyometric method in developing and improving the explosive force of the lower extremities The digital achievement of long jumpers is a smaller category from a standpoint Athletics trainers - a field study in the wilaya of Annaba - Algeria. (2021). Journal of Studies and Researches of Sport Education, 31(4), 159-171. https://www.jou.jsrse.edu.iq/index.php/home/article/view/24