Fatoni F, Kamal M, Asyhari H, Juhanis J. Influence of ACE Gene Polymorphism on Heart Rate Dynamics During Submaximal Exercise Following a 3-Month Fartlek Training Program in Male Adolescents. GJSES [Internet]. 2026 Mar. 31 [cited 2026 Aug. 29];2(1). Available from: https://gjses.org/index.php/gjses/article/view/50