hamed mari, ali, marwan sameer Al khalde, and alwaleed Salim Albasso. “The Empact of Special Exercises Using )Rubber Cord (on the Special Endurance and Achievement of Swimming 100 Meters Breaststroke for Youth”. College of Basic Education Research Journal 20, no. 3 (September 1, 2024): 545–561. Accessed October 26, 2025. https://moss.uomosul.edu.iq/index.php/berj/article/view/38060.