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Body fat related to daily physical activity and insulin concentrations in non-diabetic children

Magnus Dencker1, Ola Thorsson, Magnus K Karlsson

  • 1Department of Clinical Sciences, Malmö, Lund University, Sweden. magnus.dencker@skane.se

Clinical Physiology and Functional Imaging
|January 8, 2008
PubMed

Insights

Body fat distribution, not total fat, is linked to higher insulin levels in children. Less vigorous physical activity correlates with poorer body fat distribution and increased insulin.

Area of Science:

  • Pediatric Endocrinology
  • Metabolic Health
  • Exercise Physiology

Background:

  • Childhood obesity is a growing concern, impacting metabolic health.
  • Understanding the interplay between body composition, physical activity, and insulin is crucial for early intervention.

Purpose of the Study:

  • To investigate the relationship between body fat distribution, total body fat, and daily physical activity with serum insulin concentrations in non-diabetic children.
  • To differentiate the impact of fat distribution versus overall adiposity on insulin levels.

Main Methods:

  • Cross-sectional study of 172 children (aged 8-11 years).
  • Measurement of serum insulin levels via blood samples.
  • Quantification of abdominal fat mass (AFM), total body fat (TBF), and body fat percentage (BF%) using dual-energy x-ray absorptiometry (DXA).
  • Assessment of daily physical activity and vigorous activity time using accelerometers.

Main Results:

  • Body fat distribution (AFM/TBF) was independently associated with both higher insulin concentrations and lower levels of vigorous physical activity.
  • Total body fat (TBF), abdominal fat mass (AFM), and body fat percentage (BF%) were associated with physical activity but not independently with insulin concentrations.
  • Decreased vigorous activity per day was linked to poorer body fat distribution and elevated insulin levels.

Conclusions:

  • In non-diabetic children, body fat distribution is a significant independent predictor of insulin concentrations, independent of total body fat.
  • Reduced vigorous physical activity is associated with unfavorable body fat distribution and increased insulin levels in this pediatric cohort.
  • These findings highlight the importance of fat distribution and physical activity in pediatric metabolic health.

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