Polevoy G. ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR Períodos sensitivos para el desarrollo de la resistencia de los escolares (Sensitive periods for the development of endurance of schoolchildren): ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR. Retos [Internet]. 2024 Jun. 1 [cited 2026 Jun. 15];55:672-8. Available from: https://www.revistaretos.org/index.php/retos/article/view/104093