Estimating VO2max in children aged 5–6 years through the preschool-adapted 20-m shuttle-run test (PREFIT) - Mora-Gonzalez, J; Cadenas-Sanchez, C; Martinez-Tellez, B; Sanchez-Delgado, G; Ruiz, J R; Leger, L; Ortega, F B (Eur J Appl Physiol, 2017)