| Abstrakt: |
Total body potassium, fat-free mass, and body cell mass supported by anthropometrical appraisal of leanness-fatness were determined in 111 randomly selected adolescent boys and in 100 randomly selected adolescent girls. Statistical analysis of age and sex differences revealed that, in early adolescence, boys gained total body potassium, fat-free mass, and cellular mass, with a concomitant decrease of body fat, except at the ages of 12 and 13 years. At 11 and 12 years of age, the body composition of boys and girls was alike; but after that the girls' percentages of fat-free mass and body cell mass decreased with age and body fat increased. Anthropometrical appraisal of corrected diameters and volumes of the limbs supported interpretations of results obtained from total body potassium. |
