Effect of Modified Valsalva Maneuver on Heart Rate and ECG among Young Non –Athletes and Athletes. International Journal of Physiology, [S. l.], v. 7, n. 2, p. 204–208, 2019. DOI: 10.37506/ijop.v7i2.233. Disponível em: https://ijop.net/index.php/ijop/article/view/233. Acesso em: 19 may. 2026.