Golubeva G.N., Dvorkina N.I., Starkova E.V., and Peshkova N.V. “Evolution of Fitness Trends through a Comparative Lens”. Theory and Practice of Physical Culture, no. 2 (March 30, 2025): 96–99. Accessed March 4, 2026. http://tpfk.ru/index.php/TPPC/article/view/1273.