Vypasniak, Igor, Olena Nesen, and Marina Jagiello. “Enhancing Physical Fitness through Crossfit for 15-16-Year-Old High School Students”. Physical Culture, Recreation and Rehabilitation 3, no. 1 (June 30, 2024): 10–15. Accessed June 24, 2026. https://www.physcult.org.ua/index.php/pc/article/view/74.