The use of hypoxic exercises in terms of the concentration of lactic acid in the blood to develop speed endurance and the completion of a 200-meter run. Journal of the College of Basic Education, [S. l.], v. 21, n. 91, p. 873–896, 2022. DOI: 10.35950/cbej.v21i91.7376. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/7376.. Acesso em: 20 jul. 2024.