What is childhood obesity?
Childhood obesity is the presence of excess body fat to a degree that can adversely affect a child’s health. In children, this is assessed not with a fixed BMI number as in adults but with a BMI percentile for age and sex: between the 85th and 95th percentile is considered overweight, and the 95th percentile and above is considered obesity (with the Neyzi 2008 reference for Turkey). The waist-to-height ratio (WHtR), in turn, is a practical additional screening indicator that reflects fat in the abdominal region, independent of BMI.
Obesity is not due to a single cause; it depends on a combination of genetic predisposition, eating pattern, inactivity, sleep, stress and environmental factors. For this reason, viewing it as a matter of “willpower” is both wrong and harmful.
Why does it matter?
Childhood obesity is not only a matter of weight; it can bring certain health risks at an early age. These include a tendency toward insulin resistance and type 2 diabetes, high blood pressure, fatty liver, sleep apnoea, joint problems and disturbances in blood lipids. In addition, childhood obesity has a high likelihood of carrying into adulthood, which raises its importance for lifelong health.
At least as important as the physical risks is the psychosocial dimension: stigma, peer bullying, body-image problems and loss of self-esteem. For this reason, the approach to the matter should be focused on health and habits, without shaming the child or applying pressure framed around appearance.
Assessment: which tools?
The first screening is simple: BMI percentile for age and sex, and the waist-to-height ratio. If these indicators show a picture worth attention, the doctor may request additional assessment. Among the things often examined are insulin resistance (HOMA-IR from fasting glucose and insulin), blood pressure (AAP thresholds for age and sex) and, where needed, blood lipids and liver values.
What matters is not a single measurement but the trend over time: is the child’s BMI percentile rising steadily? These tools do not make a diagnosis; they provide input to a doctor’s holistic assessment. The platform’s BMI/percentile, waist-to-height ratio, HOMA-IR and blood-pressure screening calculators can be helpful in this context.
Approach: the whole family, habit-focused
The basis of obesity management in children is not restrictive diets but sustainable lifestyle changes adopted by the whole family. Applying a child-specific “diet” often backfires and is risky for body image and eating behaviour. Instead, the focus is on balanced nutrition (the Mediterranean pattern is a good model), replacing sugary drinks with water, a regular breakfast, enough daily movement (WHO: about 60 min a day), reducing long periods of inactivity, and adequate sleep.
The most effective way is to apply these changes not to the child but to the family system: having healthy options accessible at home, the parent setting an example, and moving together. The goal is not rapid weight loss; in most children, even holding weight steady while they grow (so that the ratio improves as height increases) is enough. If there is a clear situation or an accompanying health problem, a plan should be made alongside the paediatrician and, where needed, a dietitian/endocrinologist.