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Table 1 Body composition, quantitative ultrasonography parameters, and physical fitness regarding the sex and pubertal stage of 300 students

From: Cross-sectional study of the association of body composition and physical fitness with bone status in children and adolescents from 11 to 16 years old

  Sex Pubertal stages Total
Variables Girls Boys Pre/intra Pubertal  
  (n = 104) (n = 94) (n = 124) (n = 176) (n = 300)
Weight (Kg) 47.6 ± 1,3 51.1 ± 1.3 46.6 ± 1.1 52.0 ± 0.9b 49.8 ± 0.6
Height (m) 1.53 ± 0,006 1.56 ± 0.006 1.52 ± 0.007 1.58 ± 0.006b 1.55 ± 0.004
BMI (Kg/m 2 ) 21.1 ± 0,3 20.6 ± 0.3 20.0 ± 0.4 20.7 ± 0.3 20.5 ± 0.2d
% Body fat 24.3 ± 0,7 22.10 ± 0.2 23,7 ± 0.8 22.7 ± 0.6 23.3 ± 0.4d
Fat mass (Kg) 12.1 ± 0.6 12.0 ± 0.5 11.8 ± 0.7 12.3 ± 0.5 12.2 ± 0.4d
Fat-free mass (Kg) 35.50 ± 0,5 39.0 ± 0.5 34.9 ± 0.6 39.7 ± 0.5b 37.6 ± 0.4
AD-SoS 2,012 ± 5.0 1,959 ± 5.1a 1,974 ± 6.0 1,997 ± 5.2c 1,988 ± 3.4
UBPI 0.73 ± 0.13 0.62 ± 0.12a 0.64 ± 0.01 0.71 ± 0.01b 0.69 ± 0.009d
Flexibility (cm) 22.7 ± 0.6 19.8 ± 0.6a 21.4 ± 0.8 21.1 ± 0.6 21.3 ± 0.4
Abdominal (n) 25.4 ± 0.8 33.5 ± 0.7 28.0 ± 0.9 30.1 ± 0.7 29.4 ± 0.6d
Horizontal jump (cm) 126.5 ± 1.6 147.4 ± 1.5 135.7 ± 1.9 138.2 ± 1.5 136.5 ± 1.3d
VO 2 peak (ml/Kg/min) 40.7 ± 0.3 42.9 ± 0.3 41.6 ± 0.4 42.0 ± 0.3 41.8 ± 0.2d
  1. Results are given as the mean ± SD.
  2. adifferences between sex (p < 0,01); b differences between pubertal stages (< 0,01); c differences between pubertal stages (< 0,05); d interaction sex × pubertal stage.