Moderate physical activity correlates with elevated leptin in physically active 10-12-year-old boys with normal BMI

Area of Science:

• Pediatric Endocrinology
• Sports Medicine
• Hormone Research

Background:

• Leptin is a key hormone regulating energy balance and body weight.
• Understanding the relationship between physical activity and leptin is crucial for pediatric health.
• Previous research has yielded mixed results on physical activity's impact on leptin levels in children.

Purpose of the Study:

• To investigate the association between varying intensities and durations of physical activity and serum leptin levels in pre-pubertal boys.
• To explore differences in leptin levels across subgroups of boys based on their physical activity patterns.
• To identify specific physical activity parameters correlated with leptin in this age group.

Main Methods:

• A cohort of 94 boys aged 10-12 years with normal BMI and Tanner Stage 2 development participated.
• Physical activity was self-reported via questionnaire, focusing on moderate-to-vigorous activity.
• Boys were categorized into normal, low, and high serum leptin subgroups for analysis.

Main Results:

• Significant differences in anthropometric measures and leptin levels were observed between leptin subgroups.
• No significant differences in overall physical activity levels were found across the leptin subgroups.
• A significant positive correlation (r = .61) was identified between leptin levels and engaging in moderate physical activity five times per week for at least 30 minutes, specifically within the high leptin group.

Conclusions:

• The relationship between physical activity and leptin in 10-12-year-old boys appears to be weak overall.
• Moderate physical activity, performed consistently, showed a correlation with leptin levels, particularly in boys with higher baseline leptin.
• Further research is needed to elucidate the complex interplay between different types of physical activity and leptin regulation in children.