Jakubowska, K., Pawelec-Winiarz, M., Włosiński, M., & Cichosz, M. (2022). Effect of physical activity on peak expiratory flow and the 6-minute walk test. Journal of Education, Health and Sport, 12(6), 323–330. https://doi.org/10.12775/JEHS.2022.12.06.031