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Body composition changes during Tanner stage 5.

M Horlick1, J Thornton, J Wang

  • 1Body Composition Unit, St. Luke's-Roosevelt Hospital Center, New York, New York 10025, USA. mnh1@columbia.edu

Annals of the New York Academy of Sciences
|June 24, 2000
PubMed
Summary
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Body composition changes with age during late puberty (Tanner stage 5). Lean body mass increases more in males, suggesting age impacts maturity definitions, particularly for males.

Area of Science:

  • Human Physiology
  • Adolescent Development
  • Body Composition Analysis

Background:

  • Maturity assessment in adolescents typically relies on Tanner stage 5 (T5), final height, and epiphyseal fusion.
  • The influence of age on body composition during T5 requires further investigation.

Purpose of the Study:

  • To test if age-related body composition changes are identifiable during Tanner stage 5 (T5) of puberty.
  • To explore the independent effects of age and ethnicity on body composition during T5.

Main Methods:

  • Cross-sectional study of 148 adolescents (T5) across Asian, Black, Hispanic, and White ethnicities.
  • Measurements included height, weight, total body potassium (40K), total body water (D2O), bone mineral, fat-free mass, and fat mass (DXA).

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Main Results:

  • Relative increases in lean body components with age were greater than height and weight increases, particularly in males.
  • Age significantly determined all body components in males, but only bone mineral in females.
  • The effect of age on body composition was independent of ethnicity.

Conclusions:

  • Age has an independent effect on body composition during T5, with pronounced effects in males.
  • Peak lean body component levels may warrant inclusion in maturity definitions for clinical and metabolic assessments.