EFFECT OF PHYSICAL EFFORT ON RATE OF CARDIAC CONTRACTION TIME, BLOOD FLOW IN CORONARY ARTERY, AND MYOCARDIAL OXYGEN CONSUMPTION AMONG YOUTH SOCCER PLAYERS. PJSSPE. 2024;1(6):22-26. Accessed November 19, 2024. https://proximusjournal.com/index.php/PJSSPE/article/view/85