Childhood obesity is a global problem, with its prevalence in the developed world increasing fourfold in recent decades. Obesity in children is defined by the Body Mass Index and is responsible for many physical and psychological problems, as well as for reduced perceived quality of life. In recent years, it has become increasingly worrying that diseases affecting adult populations, such as diseases of the cardiorespiratory system, also affect children, as well as the health of adults who have been obese children. The involvement of physiotherapists in the treatment of obesity in children and adolescents can lead to a more understandable assessment and improved care and treatment of obesity.