Table 1 Descriptive statistics (mean ± standard deviation) by sports and time moment in addition to estimated means for aBMD of the total and subhead (standard error) controlling for variation in stature among male adolescent athletes (soccer players, n = 20; swimmers, n = 20)

Training minutes

5696 ± 2808

23,378 ± 3368

Training sessions

63 ± 31

248 ± 28

Stature, cm

149.8 ± 5.9

157.8 ± 7.1

154.8 ± 7.5

161.2 ± 8.2

Body mass, kg

41.6 ± 7.2

46.8 ± 8.6

44.1 ± 7.4

49.0 ± 7.1

Fat tissue, %

18.0 ± 7.6

17.1 ± 7.9

14.0 ± 8.5

11.6 ± 7.8

LST: total body, kg

30.6 ± 3.8

35.8 ± 5.6

34.9 ± 5.2

40.5 ± 6.2

LST: trunk, kg

13.75 ± 1.76

16.20 ± 2.72

15.83 ± 2.63

18.68 ± 3.09

LST: upper limbs, kg

2.91 ± 0.43

3.47 ± 0.59

3.53 ± 0.63

4.16 ± 0.80

LST: lower limbs, kg

10.81 ± 1.58

12.84 ± 2.25

12.13 ± 1.93

14.16 ± 2.37

aBMD: total body, g.cm⁻²

0.993 ± 0.041

1.027 ± 0.055

0.956 ± 0.065

0.976 ± 0.074

1.001 (0.012)^a

1.037 (0.014)^a

0.948 (0.012)^a

0.966 (0.014)^a

aBMD: subhead, g.cm⁻²

0.885 ± 0.050

0.939 ± 0.069

0.847 ± 0.073

0.880 ± 0.077

0.896 (0.013)^a

0.952 (0.015)^a

0.636 (0.013)^a

0.867 (0.015)^a

aBMD: trunk, g.cm⁻²

0.806 ± 0.041

0.857 ± 0.061

0.799 ± 0.072

0.843 ± 0.077

aBMD: upper limbs, g.cm⁻²

0.684 ± 0.110

0.698 ± 0.053

0.667 ± 0.046

0.688 ± 0.061

aBMD: lower limbs, g.cm⁻²

1.056 ± 0.077

1.122 ± 0.094

0.987 ± 0.091

1.016 ± 0.106

aBMD: PF-neck, g.cm⁻²

0.950 ± 0.084

1.013 ± 0.104

0.895 ± 0.111

0.923 ± 0.115

aBMD: PF-ward, g.cm⁻²

0.941 ± 0.105

1.003 ± 0.128

0.849 ± 0.139

0.866 ± 0.139

aBMD: PF-trochanter, g.cm⁻²

0.822 ± 0.078

0.889 ± 0.099

0.762 ± 0.099

0.788 ± 0.097