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Related Experiment Videos

Adipocytes and adiposity in adults

W C Chumlea, A F Roche, R M Siervogel

    The American Journal of Clinical Nutrition
    |September 1, 1981
    PubMed
    Summary

    Body fat increases with age in adults, driven by a rise in adipocyte number, not size. This finding impacts understanding of adult body composition changes.

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    Area of Science:

    • Human Physiology
    • Body Composition Research

    Background:

    • Understanding adult body composition changes is crucial for metabolic health.
    • Previous assumptions suggested adipocyte number remains stable during adulthood.

    Purpose of the Study:

    • To investigate the relationship between adipocyte size, adipocyte number, and body fat across different adult age groups.
    • To determine how age influences adipocyte characteristics and overall body fat percentage.

    Main Methods:

    • Cross-sectional study of 217 nonobese adults aged 20-50 years.
    • Measurements included adipocyte size, body density, total body fat, and percentage body fat.
    • Calculated estimates for adipocyte number.

    Main Results:

    • Adipocyte number, total body fat, and percentage body fat positively correlated with age in both sexes.
    • Adipocyte size did not correlate with age but positively correlated with body fat in both sexes.
    • Women generally had higher body fat percentage, with variations in total body fat and adipocyte size by age group.

    Conclusions:

    • Adipocyte number increases with age in adults, contrary to previous beliefs.
    • Increased adipocyte number is associated with higher total and percentage body fat.
    • Adipocyte size is linked to body fat levels but not directly to aging in this cohort.

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