GRAJEK, Mateusz, KUJAWIŃSKA, Maria, DUSZYŃSKA, Paulina, GROT, Martina and KOBZA, Joanna. Changing health behaviors under lockdown: the impact of the COVID-19 pandemic on adult physical activity and well-being. Journal of Education, Health and Sport. Online. 2 July 2022. Vol. 12, no. 7, pp. 277-285. [Accessed 27 April 2024]. DOI 10.12775/JEHS.2022.12.07.027.