Hernández Rodríguez, K.A. and Carolina Bustos, D. 2018. METHODOLOGICAL CONSIDERATIONS FOR SPORTS TRAINING IN ATHLETICS IN AGES 12-14 YEARS. Revista digital: Actividad Física y Deporte. 3, 1 (Feb. 2018). DOI:https://doi.org/10.31910/rdafd.v3.n1.2017.356.