The prevalence of excess weight and obesity in children has increased in recent decades and has become a global health concern. Excess weight affects one in three children worldwide. Children with obesity face a higher risk of developing cardiovascular disease or type 2 diabetes, as well as experiencing significant functional limitations that will affect their quality of life. Researchers from the University of Granada say that schoolchildren who exercise improve their physical fitness and health, and just five months of exercise are enough to restore their health. The study says that after a five-month exercise program, a significant number of schoolchildren at a high risk of metabolic syndrome were able to move out of this risk group. A similar trend was observed in both boys and girls who went from poor physical fitness to optimal physical fitness, based on aerobic capacity. The activities included running on an outdoor track and moderate to high intensity strength exercises, without any advanced equipment. The study shows the importance of including physical activity in the treatment of childhood obesity and preventing the development of metabolic problems.