The participants were randomly allocated to control group (CG), experimental group 1 (EG1) and experimental group 2 (EG2). The CG received 2 physical education sessions/week, the EG1 received 4 physical education sessions/week (volume increased) and the EG2 received 4 physical education sessions/week of high intensity (volume+intensity increased). Several health-related parameters were assessed before and after a 16-weeks intervention: physical fitness (primary outcome), body composition (secondary), and lipid-metabolic profile, ventilatory parameters, blood pressure, and cognitive and academic performance (tertiary outcomes).