Stadnik, L., Kozłowska, A., Przybysz, K., Woroniecka, N., Dzwonkowska, A., Zienkiewicz, N., … Dzwonkowski, J. (2026). Cortisol as a Blood Biomarker for Monitoring Endurance Training - A Narrative Review. Quality in Sport, 65, 74045. https://doi.org/10.12775/QS.2026.65.74045