Table 8 Weighted means and standard deviations for physical qualities in male, adolescent rugby league players according to age group and test

Anthropometric quality

Height (cm)

–

171.58 ± 7.66

174.18 ± 6.26

176.61 ± 6.50

174.53 ± 5.44

179.34 ± 5.61

180.01 ± 5.30

Seated height (cm)

–

88.43 ± 4.24

88.55 ± 3.67

90.75 ± 3.24

–

91.83 ± 2.24

–

Body mass (kg)

50.68 ± 9.32^c

65.42 ± 11.44

68.13 ± 10.98

75.36 ± 10.86

78.78 ± 9.95

84.89 ± 10.76

87.35 ± 9.91

Skinfold thickness (mm) using Σ4 sites

–

37.73 ± 15.40

38.72 ± 15.91

40.22 ± 15.54

36.81 ± 13.37

39.01 ± 12.50

37.44 ± 11.52

Skinfold thickness (mm) using Σ7 sites

–

–

73.3– ± 8.4–^b

74.05 ± 22.13

73.45 ± 22.37

92.94 ± 35.92

–

Linear speed

10-m sprint time (s)

–

1.94 ± 0.12

1.94 ± 0.12

1.85 ± 0.13

1.80 ± 0.06

1.81 ± 0.62

1.81 ± 0.07

20-m sprint time (s)

^–

3.36 ± 0.17

3.37 ± 0.17

3.11 ± 0.16

3.11 ± 0.09

3.11 ± 0.10

3.10 ± 0.12

Change-of-direction speed

505 Agility Test(s)^a

–

2.52 ± 0.15

2.49 ± 0.15

2.50 ± 0.15

2.30 ± 0.13

–

–

L-run (s)

–

–

–

–

8.60 ± 0.40

8.7 ± 0.4

Aerobic capacity

MSFT (predicted \(\dot{\mathrm{V}}\)O_2max in mL kg⁻¹ min⁻¹)

34.23 ± 4.16^c

47.50 ± 4.97

48.47 ± 5.11

49.58 ± 4.58

47.26 ± 0.51

46.65 ± 6.17

48.50 ± 2.90^b

Yo-Yo Intermittent Recovery Test Level I (m)

–

–

1027 ± 510^I

810.6 ± 276.76

1365.51 ± 361.85

915.65 ± 247.58

1192.35 ± 367.80

Muscular strength

Bench press 1RM^b

–

–

74.38 ± 12.83

93.48 ± 13.41

99.84 ± 16.02

112.82 ± 16.25

Back squat 1RM^b

–

–

99.62 ± 19.92

122.63 ± 17.98

126.83 ± 17.71

137.99 ± 19.27

Prone row 1RM^b

–

–

–

71.59 ± 9.89

83.65 ± 10.26

87.35 ± 10.81

97.13 ± 7.80

Muscular power

Medicine ball throw (m)

–

5.47 ± 0.82

5.81 ± 0.70

6.25 ± 0.77

–

7.01 ± 0.80

–