Guillamón, E. M.-C. “Innovation in Physical Education. Curricular Materials for a Significant Learning in Concepts of Healthy Back”. Lecturas: Educación Física Y Deportes, Vol. 23, no. 247, Dec. 2018, pp. 50-67, https://efdeportes.com/efdeportes/index.php/EFDeportes/article/view/289.