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In children and youth, regular physical activity and adequate diet are necessary for normal growth and they impact a range of health outcomes1 including overweight and obesity. Children are a critical target group for public health efforts to prevent overweight and obesity. Key elements to prevent excess bodyweight are physical activity, sedentary time and a healthy diet. Several structural changes during the past decades have led to changes in these behaviors. It is easy to make the unhealthy choices and gain excess bodyweight. Thus, effective interventions to promote physical activity and a healthy diet are essential.
The health in adolescents (HEIA) study
In a related paper, Grydeland et al2 report results from a systematically developed 20-month cluster randomised controlled school-based intervention—the HEalth In Adolescents (HEIA) study—on body composition outcomes. The HEIA study has previously reported intervention effects on targeted behaviours …
Competing interests None.
Provenance and peer review Commissioned; internally peer reviewed.