Bryliński, Łukasz, Woliński, F. , Duda, P. , Drożak, P. , Kostelecka, K. and Baj , J. 2022. Overtraining syndrome - what we already know. Journal of Education, Health and Sport. 12, 6 (Jun. 2022), 192–204. DOI:https://doi.org/10.12775/JEHS.2022.12.06.020.