Table 8. Spearman’s rho correlation coefficients between strength measurement outcomes and the gait parameters that differed from the TD children.
Moderate or higher correlations are printed in bold.
| Self-selected walking speed | Knee extension MVIC (Nm/kg) |
Knee flexion MVIC (Nm/kg) |
Dorsiflexion MVIC (Nm/kg) |
Plantar flexion MVIC (Nm/kg) |
Plantar flexion RFD (N/s) |
Non-dimensional walking speed |
| Maximal hip extension angle during stance (deg) | -0.09 | 0.18 | 0.34 | 0.07 | 0.29 | -0.31 |
| Knee angle at initial contact (deg) | -0.05 | 0.03 | 0.20 | -0.16 | 0.09 | -0.42* |
| Maximal knee flexion angle during stance (deg) | 0.33 | -0.04 | 0.07 | -.071 | -.231 | -.194 |
| Maximal knee flexion angle during swing (deg) | -0.17 | -0.26 | -0.16 | 0.61** | 0.37 | -0.39 |
| Timing maximal knee flexion in swing (% GC) | -0.23 | -0.26 | -0.44* | 0.06 | -0.20 | -0.43* |
| Ankle angle at initial contact (deg) | 0.00 | 0.22 | 0.11 | -0.04 | 0.16 | 0.04 |
| Maximal dorsiflexion angle during swing (deg) | 0.04 | 0.12 | 0.16 | -0.07 | 0.19 | 0.15 |
| Maximal knee extension torque (Nm/kg) | -0.15 | -0.02 | 0.07 | -0.16 | 0.12 | 0.00 |
| Maximal knee flexion torque (Nm/kg) | 0.13 | -0.30 | -0.28 | -0.16 | -0.17 | 0.13 |
| Ankle torque during loading response (Nm/kg) | -0.20 | -0.01 | 0.00 | 0.06 | -0.21 | -0.20 |
| Maximal plantar flexion torque (Nm/kg) | 0.14 | 0.25 | 0.03 | 0.26 | 0.32 | -0.04 |
| Maximal power generation at the ankle (W/kg) | -0.02 | -0.01 | -0.30 | -0.03 | -0.05 | 0.30 |
| GDI | 0.21 | -0.00 | -0.05 | 0.12 | -0.14 | 0.24 |
| GDI-kinetic | 0.18 | 0.21 | -0.09 | 0.19 | 0.05 | 0.18 |
| Non-dimensional walking speed | 0.05 | -0.12 | -0.23 | -0.26 | -0.20 | |
| Walking as fast as possible | Knee extension MVIC (Nm/kg) |
Knee flexion MVIC (Nm/kg) |
Dorsiflexion MVIC (Nm/kg) |
Plantar flexion MVIC (Nm/kg) |
Plantar flexion RFD (N/s) |
Non-dimensional walking speed |
| Maximal hip extension angle during stance (deg) | 0.04 | 0.23 | 0.40 | -0.05 | 0.05 | 0.10 |
| Knee angle at initial contact (deg) | -0.19 | -0.02 | 0.22 | -0.17 | 0.06 | -0.38 |
| Maximal knee flexion angle during stance (deg) | 0.21 | 0.11 | -0.01 | 0.00 | -0.07 | -0.11 |
| Maximal knee flexion angle during swing (deg) | 0.04 | -0.01 | 0.02 | 0.64** | 0.22 | -0.03 |
| Timing maximal knee flexion in swing (% GC) | -0.13 | 0.03 | -0.15 | 0.14 | -0.09 | -0.23 |
| Ankle angle at initial contact (deg) | -0.13 | 0.20 | 0.25 | -0.10 | 0.05 | 0.16 |
| Maximal dorsiflexion angle during swing (deg) | -0.08 | 0.12 | 0.26 | -0.13 | 0.12 | 0.17 |
| Maximal knee extension torque (Nm/kg) | -0.22 | 0.04 | 0.08 | -0.19 | -0.13 | 0.04 |
| Maximal knee flexion torque (Nm/kg) | 0.30 | 0.02 | -0.36 | 0.02 | 0.08 | 0.31 |
| Ankle torque during loading response (Nm/kg) | -0.13 | -0.01 | -0.01 | -0.18 | -0.10 | 0.02 |
| Maximal plantar flexion torque (Nm/kg) | 0.10 | 0.13 | -0.06 | 0.09 | 0.31 | 0.15 |
| Maximal power generation at the ankle (W/kg) | 0.13 | 0.13 | -0.02 | -0.00 | -0.02 | 0.50* |
| GDI | 0.18 | -0.05 | -0.08 | -0.00 | -0.17 | 0.41 |
| GDI-kinetic | -0.01 | -0.24 | 0.07 | -0.08 | 0.10 | -0.49* |
| Non-dimensional walking speed | 0.08 | 0.32 | 0.05 | 0.22 | 0.01 |
Abbreviations in alphabetic order: deg = degrees; GDI = gait deviation index; MVIC = maximal voluntary isometric contraction; N/s = Newtons per second; Nm/kg = Newton meters per kilogram bodyweight; RFD = rate of force development; W/kg = Watts per kilogram bodyweight.
* p ≤ 0.05
** p ≤ 0.01