Fatoni, Fatoni, Muhammad Kamal, Hasbi Asyhari, and Juhanis Juhanis. 2026. “Influence of ACE Gene Polymorphism on Heart Rate Dynamics During Submaximal Exercise Following a 3-Month Fartlek Training Program in Male Adolescents”. Global Journal of Sport and Exercise Science (GJSES) 2 (1). https://doi.org/10.63750/cxm5em66.