Sadiq kani H, Easa FA. The Effect of Intensity Distribution and Concentration Exercises on Developing Speed Endurance and Some Physiological Indicators and Achieving 100-Meter Freestyle Swimming. JSRSE [Internet]. 2022 Jun. 30 [cited 2025 Apr. 19];32(1):80-9. Available from: https://jsrse.edu.iq/index.php/home/article/view/268