OBE2026 - Effect of One Year Intensive Lifestyle Treatment in Children With ISO-BMI Over 30kg/m² and Their Families.

Obesity has increased significantly in recent decades and is starting earlier than before, even before school age. In 2023, 8% of Finnish boys aged 7-12 and 4% of girls were obese, while the corresponding figures for boys aged 13-16 were 9% and 4%, respectively. Overweight and obesity are classified using age- and gender-specific BMI percentile limits, which are derived from adult (18-year-old) BMI cutoffs for overweight (BMI 25-30 kg/m²) and obesity (BMI \> 30 kg/m²). Childhood obesity has a significant tendency to persist into adulthood. Obesity treatment and long-term weight management require an effective intervention that combines both permanent dietary modification and increased physical activity. Obesity has significant physical, psychological, social and economic impacts on both individuals and society. Obesity drug trials have always included lifestyle interventions, but their intensity and long-term follow-up data vary. In addition, for children and young people, intervention should be targeted at the entire family, if possible, because a child alone is not able to modify everyday activities. Stress, depression and other psychologically stressful factors experienced in the family increase the risk of eating habits that predispose to obesity and weight gain. The role of the family in the development of obesity in children and adolescents is central. Parental obesity is a significant risk factor for childhood obesity. Parents' lifestyles, family eating patterns, and eating habits are linked to childhood obesity. A healthy diet, regular meal times, and appropriate portion sizes are key factors in weight management. In addition, low physical activity is associated with overweight and obesity. Excessive sitting and other sedentary activities during waking hours may contribute to the development of obesity. Computer games are a challenge in the treatment of childhood obesity, both in terms of their inactivity and addictiveness. Physical activity promotes weigh