Mayorga Aguilar, L., Martínez-Salazar, C. and Carcamo-Oyarzun, J. (2021) “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(1), pp. 1–11. doi:10.15359/mhs.19-1.8.