Changes in leptin, insulin and body composition in obese children during a weight reduction program

Area of Science:

• Pediatric Endocrinology
• Obesity Research
• Metabolic Health

Background:

• Girls exhibit higher leptin concentrations than boys across developmental stages, including obesity.
• Limited understanding exists regarding gender and developmental influences on leptin changes in obese children undergoing weight reduction.

Purpose of the Study:

• To investigate the impact of a 3-week diet and sports intervention on leptin concentration, body composition, and insulin levels in obese children.
• To determine if gender and biological development influence these changes.

Main Methods:

• A 3-week intervention program involving diet and sports was implemented.
• Sixty-two obese children (32 boys, 30 girls) were assessed before and after the intervention.
• Body composition was measured using bioelectrical impedance, and serum leptin and insulin were quantified.

Main Results:

• Both sexes showed decreased body mass, fat mass (FM), leptin, and insulin post-intervention.
• Girls exhibited a greater absolute change in serum leptin, while boys showed a greater change in FM.
• Leptin concentrations correlated with %FM, FM, and BMI-SDS before intervention; this correlation strengthened in pubertal boys post-intervention.

Conclusions:

• Diet and sports interventions effectively reduce leptin, insulin, and body fat in obese children.
• Changes in leptin levels are primarily predicted by initial concentrations.
• Enhanced leptin-fat mass correlation in pubertal boys may indicate increased sensitivity to leptin and anabolic hormones.