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Table 2 Mean values of somatic characteristic – measurement before restricted the PA (G1)

From: Changes in the body composition of boys aged 11–18 years due to COVID-19 measures in the Czech Republic

Parameters

Age (years)

11

12

13

14

15

16

17

18

M ± SD

M ± SD

M ± SD

M ± SD

M ± SD

M ± SD

M ± SD

M ± SD

BH (cm)

149.1 ± 6.1

154.9 ± 7.3

165.5 ± 9.6

172.7 ± 8.3

177.7 ± 6.7

178.7 ± 6.6

179.8 ± 7.5

180.5 ± 7.0

BM (kg)

42.0 ± 9.2

44.7 ± 9.9

53.6 ± 10.9

61.1 ± 10.3

66.0 ± 8.1

70.1 ± 11.3

72.9 ± 12.2

75.1 ± 10.3

BMI (kg/m2)

18.8 ± 3.4

18.5 ± 3.4

19.4 ± 2.6

20.4 ± 2.3

20.9 ± 2.0

22.0 ± 3.3

22.5 ± 3.1

23.0 ± 2.7

BF (kg)

9.6 ± 6.2

7.9 ± 5.4

7.2 ± 5.0

6.1 ± 4.1

6.7 ± 3.6

9.4 ± 6.2

10.1 ± 6.3

10.1 ± 5.6

BF (%)

21.3 ± 9.3

16.5 ± 7.7

13.1 ± 7.2

9.7 ± 5.2

10.0 ± 4.9

12.8 ± 6.6

13.3 ± 5.9

13.1 ± 5.3

VFA (cm2)

54.2 ± 32.8

36.8 ± 27.7

30.7 ± 25.9

23.1 ± 20.5

25.9 ± 18.6

38.9 ± 29.4

42.2 ± 28.3

41.2 ± 26.9

FFM (kg)

32.4 ± 4.5

36.8 ± 6.2

46.3 ± 9.0

55.0 ± 8.7

59.3 ± 7.2

60.7 ± 8.0

62.8 ± 8.5

65.0 ± 7.4

SMM (kg)

17.2 ± 2.7

19.8 ± 3.7

25.5 ± 5.4

30.8 ± 5.2

33.4 ± 4.3

34.3 ± 4.8

35.6 ± 5.1

37.0 ± 4.5

SMM (%)

41.6 ± 4.9

44.9 ± 4.1

47.7 ± 4.3

50.5 ± 3.2

50.7 ± 2.7

49.2 ± 3.9

49.1 ± 3.5

49.4 ± 3.1

  1. BH body height, BM body mass, BMI body mass index, BF body fat, VFA visceral fat area, FFM fat free mass, SMM skeletal muscle mass, M mean, SD standard deviation