Kalih BS, Rahmadani EA. Comparison of 800 Meter and 400 Meter Run Effects on The Increase Of Lactic Acid In Athletic Athlete . GJIK [Internet]. 2021 Aug. 15 [cited 2024 Nov. 5];12(03):61-7. Available from: https://journal.unj.ac.id/unj/index.php/gjik/article/view/21635