Correlation between level of physical activity using IPAQ and exercise capacity using 6 min walk test in COPD patients. A cross sectional study. International Journal of Biomedical and Advance Research, [S. l.], v. 11, n. 5, p. e5425, 2020. Disponível em: https://ssjournals.co.in/index.php/ijbar/article/view/5425. Acesso em: 16 feb. 2026.