Percentiles | Mean ± SE | Linear trend for difference across age groups (p-value)a | |||||||
---|---|---|---|---|---|---|---|---|---|
10 | 25 | 50 | 75 | 90 | |||||
Absolute Strength | |||||||||
Grip (kg)b | |||||||||
Age Group | |||||||||
6-9 y | 10 | 12 | 14 | 16 | 19 | 14.1 (13.7 –14.6) | <0.001 | ||
10-12 y | 16 | 19 | 22 | 26 | 31 | 23.1 (22.2 – 23.9) | |||
13-15 y | 24 | 27 | 31 | 37 | 44 | 32.6 (31.3 – 33.8) | |||
Full sample (6–15 y) | 11 | 14 | 20 | 28 | 36 | 22.2 (21.5 – 22.9) | |||
Leg Extensions (kg)c | |||||||||
6-9 y | 8 | 12 | 17 | 22 | 27 | 17.7 (14.9 – 20.5) | |||
10-12 y | 12 | 22 | 30 | 36 | 44 | 29.1 (25.0 – 33.2) | <0.001 | ||
13-15 y | 18 | 29 | 41 | 49 | 59 | 40.2 (33.6 – 46.8) | |||
Full sample (6–15 y) | 11 | 16 | 24 | 37 | 48 | 27.7 (23.4 – 32.0) | |||
Relative Strength | |||||||||
Grip (kg per kg of Body Weight)d | |||||||||
6-9 y | 0.37 | 0.42 | 0.48 | 0.55 | 0.61 | 0.49 (0.47 – 0.50) | |||
10-12 y | 0.34 | 0.43 | 0.50 | 0.57 | 0.62 | 0.50 (0.49 – 0.51) | 0.005 | ||
13-15 y | 0.37 | 0.45 | 0.53 | 0.60 | 0.69 | 0.53 (0.51 – 0.55) | |||
Full sample (6–15 y) | 0.37 | 0.43 | 0.50 | 0.57 | 0.64 | 0.50 (0.50 – 0.51) | |||
Leg Extensions (kg per kg of Body Weight)e | |||||||||
6-9 y | 0.31 | 0.46 | 0.63 | 0.74 | 0.87 | 0.60 (0.51 – 0.70) | |||
10-12 y | 0.31 | 0.47 | 0.66 | 0.77 | 0.86 | 0.62 (0.54 – 0.70) | 0.020 | ||
13-15 y | 0.30 | 0.47 | 0.65 | 0.82 | 0.94 | 0.65 (0.54 – 0.75) | |||
Full sample (6–15 y) | 0.31 | 0.46 | 0.64 | 0.77 | 0.89 | 0.62 (0.53 – 0.71) | |||
Plank (Seconds)f | |||||||||
6-9 y | 15 | 28 | 51 | 72 | 104 | 56.9 (52.5 – 61.3) | |||
10-12 y | 19 | 38 | 64 | 92 | 127 | 69.7 (64.7 – 74.7) | <0.001 | ||
13-15 y | 29 | 55 | 79 | 121 | 149 | 88.6 (80.3 – 96.9) | |||
Full sample (6–15 y) | 18 | 37 | 63 | 91 | 128 | 69.9 (66.1 – 73.6) | |||
Pullups (Repetitions)g | % ≥ 1 (95 % CI)h | Mean (95 % CI)h | |||||||
6-9 y | 0 | 0.5 | 2.9 | 6.5 | 10.2 | 81 (77 – 86) | 5.7 (5.3 – 6.0) | 0.029 | <0.001 |
10-12 y | 0 | 0.6 | 3.5 | 7.6 | 11.9 | 80 (76 – 85) | 6.7 (5.5 – 7.9) | ||
13-15 y | 0 | 0 | 4.7 | 10.1 | 19.5 | 74 (69 – 80) | 9.6 (8.6 – 10.6) | ||
Full sample (6–15 y) | 0 | 0.4 | 3.4 | 8.0 | 13.0 | 79 (75 – 82) | 7.0 (6.5 – 7.6) |