Ahmed MS. The effect of competitive exercises of varying distance and direction on developing motor coordination and some aspects of strength and speed for curve and straight runners in the 4x100m relay event. JSRSE [Internet]. 2025 Jul. 14 [cited 2026 Oct. 22];35(3):61-84. Available from: https://jsrse.edu.iq/index.php/home/article/view/1138