Szafraniec, A. et al. 2026. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS): Post-Exertional Malaise and the Biology of Energy Failure. Journal of Education, Health and Sport. 88, (Mar. 2026), 69423. DOI:https://doi.org/10.12775/JEHS.2026.88.69423.