Protas Михайло, Ivashchenko Ольга, and Kravchuk Тетяна. “Influence of Combined Fitness Classes on Physical Preparedness and Posture Formation in Primary School Children”. Journal of Learning Theory and Methodology 4, no. 2 (July 31, 2023): 50–56. Accessed June 13, 2026. https://ltmjournal.com/e/article/view/74.