From: Effect of maturation on muscle quality of the lower limb muscles in adolescent boys
PH I | PH II | PH III | PH IV | PH V | Significance | Effect size (η 2 ) | |
---|---|---|---|---|---|---|---|
Age, years | 13.0 ± 0.4 | 13.3 ± 0.6 | 13.7 ± 0.6 | 14.0 ± 0.6 | 14.1 ± 0.6 | 1 < 3 to 5, 2 < 4-5 | 0.19 |
Height, cm | 146.6 ± 8.1 | 154.6 ± 7.7 | 159.7 ± 7.1 | 165.1 ± 5.8 | 165.4 ± 5.3 | 1 < 2 to 5, 2 < 4 to 5, 3 < 4 | 0.20 |
Weight, kg | 38.8 ± 6.4 | 43.2 ± 8.2 | 47.4 ± 7.0 | 53.7 ± 5.6 | 53.4 ± 7.7 | 1 < 3 to 5, 2 < 4 to 5, 3 < 4 | 0.13 |
BMI, kg/m 2 | 18.0 ± 1.6 | 18.0 ± 1.9 | 18.5 ± 1.3 | 19.6 ± 1.3 | 19.4 ± 1.7 | 1 < 4, 2 < 4 to 5 | 0.03 |
Percent body fat, % | 13.8 ± 3.3 | 13.6 ± 5.7 | 14.1 ± 3.4 | 15.8 ± 3.9 | 16.3 ± 4.2 | 0.01 | |
LBM, kg | 33.3 ± 4.3 | 37.0 ± 5.2 | 40.6 ± 4.8 | 45.1 ± 4.0 | 44.4 ± 4.4 | 1,2 < 3 to 5, 3 < 4 | 0.20 |
Limb length, cm | |||||||
Femur | 35.0 ± 2.7 | 37.3 ± 2.7 | 37.7 ± 2.1 | 39.3 ± 2.0 | 38.7 ± 2.1 | 1 < 3 to 5, 2 < 4 | 0.05 |
Lower leg | 34.5 ± 2.6 | 36.6 ± 2.3 | 37.6 ± 2.0 | 38.5 ± 1.6 | 38.5 ± 1.6 | 1 < 2 to 5, 2 < 4-5 | 0.08 |
Muscle thickness, cm | |||||||
KE | 4.1 ± 0.5 | 4.0 ± 0.5 | 4.3 ± 0.5 | 4.8 ± 0.4 | 4.6 ± 0.4 | 1,2 < 4 to 5, 3 < 4 | 0.11 |
PF | 5.7 ± 0.4 | 5.8 ± 0.5 | 6.2 ± 0.5 | 6.6 ± 0.4 | 6.4 ± 0.5 | 1,2 < 3 to 5, 3 < 4 | 0.12 |
Muscle volume index, cm 3 | |||||||
KE | 748 ± 380 | 986 ± 381 | 1119 ± 323 | 1448 ± 258 | 1342 ± 265 | 1 < 3 to 5, 2 < 4 to 5, 3 < 4 | 0.11 |
PF | 582 ± 143 | 670 ± 150 | 787 ± 146 | 899 ± 115 | 848 ± 142 | 1,2 < 3 to 5, 3 < 4 | 0.15 |
Maximal voluntary joint torque, Nm | |||||||
KET | 103.8 ± 29.7 | 124.3 ± 37.6 | 147.7 ± 36.3 | 168.0 ± 39.4 | 161.6 ± 39.9 | 1 < 3 to 5, 2 < 4-5 | 0.07 |
PFT | 59.9 ± 16.9 | 84.3 ± 26.4 | 107.5 ± 39.3 | 123.4 ± 34.1 | 100.4 ± 23.8 | 1 < 2 to 5, 2 < 4 | 0.09 |
TQ/MV, Nm/cm 3 | |||||||
KET/MV | 0.16 ± 0.06 | 0.14 ± 0.05 | 0.14 ± 0.04 | 0.12 ± 0.03 | 0.12 ± 0.03 | 0.01 | |
PFT/MV | 0.11 ± 0.03 | 0.13 ± 0.03 | 0.14 ± 0.04 | 0.14 ± 0.03 | 0.12 ± 0.03 | 0.01 |