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RETOS R. RETRACTION Polevoy, G. (2024). Períodos sensitivos para el desarrollo de la resistencia de los escolares (Sensitive periods for the development of endurance of schoolchildren). Retos, 55, 672–678. https://doi.org/10.47197/retos.v55.104093. Retos [Internet]. 2025 Feb. 1 [cited 2025 Dec. 16];63. Available from: http://207.180.252.49/index.php/retos/article/view/112688