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Body Composition Changes during Tanner Stage 5
Author(s) -
HORLICK MARY,
THORNTON JOHN,
WANG JACK,
LEVINE LENORE S.,
FEDUN BARBARA,
PIERSON RICHARD N.
Publication year - 2000
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2000.tb06491.x
Subject(s) - lean body mass , body water , composition (language) , body weight , classification of obesity , endocrinology , hydrostatic weighing , physiology , bone mineral content , medicine , stage (stratigraphy) , dual energy x ray absorptiometry , zoology , bone mineral , maturity (psychological) , biology , osteoporosis , psychology , philosophy , linguistics , paleontology , developmental psychology
A bstract : Clinicians use the combination of Tanner stage 5 (T5) of puberty, final height, and epiphyseal fusion to define maturity. We tested the hypothesis that changes in body composition related to age are identifiable during T5. Asian, Black, Hispanic, and White T5 adolescents ( n = 148 , 72 females) had measurements taken of their height, weight, total body potassium by 40 K counting, total body water by D 2 O dilution; and total body bone mineral, fat‐ free mass, and fat mass by dual‐energy X‐ray absorptiometry. The relative increases with age in lean body components were greater than those in height and weight, and were greater in males. Age was a significant determinant of all body components in males, but of only bone mineral in females. The effect of age was independent of ethnicity. These findings suggest an independent effect of age on body composition during T5, especially in males. We propose that peak levels of lean body components should be included in the definition of maturity in certain clinical and metabolic situations.