The Effect of Using Special Exercises on Developing the Speed Endurance and Achievement of the 400m Freestyle Run for Students preparatory Stage. Damu Journal of Sport Sciences, [S. l.], v. 2, n. 3, p. 405–414, 2025. DOI: 10.64002/13aytv40. Disponível em: https://damujss.com/index.php/home/article/view/332.. Acesso em: 28 feb. 2026.