Mayorga Aguilar, Luis, Cristian Martínez-Salazar, and Jaime Carcamo-Oyarzun. “Perception of Effort and Objective Levels of Intensity in Physical Education Classes of Primary Schoolchildren According to Gender and Nutritional Status: A Pilot Study”. MHSalud: Revista en Ciencias del Movimiento Humano y Salud 19, no. 1 (December 9, 2021): 1–11. Accessed April 29, 2024. https://www.revistas.una.ac.cr/index.php/mhsalud/article/view/14666.