Shakir H, Khazal Jabbar A, Louis William W. Effect of interval training with two methods gradual and intermittent in development of some special physical variables and achievement of running 400 m for juniors. JSRSE [انترنت]. 15 يوليو، 2026 [وثق 12 أغسطس، 2026];36(4). موجود في: https://jsrse.edu.iq/index.php/home/article/view/1450