Differences in metabolic risk factors between normal weight and overweight children

Area of Science:

• Pediatric Endocrinology
• Metabolic Health
• Childhood Obesity

Background:

• The impact of excess weight on metabolic health in pre-pubertal children remains incompletely understood.
• The specific role of physical activity (PA) in this context requires further clarification.

Purpose of the Study:

• To compare metabolic risk factors between normal-weight and overweight pre-pubertal children.
• To investigate the association of these risk factors with objectively measured PA and cardio-respiratory fitness (CRF).

Main Methods:

• A cross-sectional study involving 68 children aged 8-11 years, categorized into normal weight and overweight/obese groups.
• Objective measurements of PA and CRF, alongside an oral glucose tolerance test (OGTT) and lipid profiles (triglycerides and HDL-cholesterol).
• Calculation of a metabolic risk score (MRS) incorporating insulin, glucose, triglycerides, HDL-cholesterol, and blood pressure.

Main Results:

• Overweight children showed significantly higher clustered metabolic risk, insulin levels (AUC), fasting insulin, and systolic blood pressure compared to normal-weight peers.
• No significant differences in PA or CRF were observed between the weight groups.
• Pooled analyses revealed negative associations between PA and insulin (AUC), and between CRF and fasting insulin.

Conclusions:

• Overweight pre-pubertal children present with heightened metabolic risk factors compared to normal-weight children.
• Lower PA or CRF did not explain these elevated risks, though both were associated with improved insulin sensitivity in combined analyses.
• Early prevention of childhood overweight is crucial for mitigating the risk of metabolic syndrome and associated chronic diseases.