Table 4. Results of hierarchical regressions to predict peak power during walking and functional measures.
| Condition | Dependent Variable | Variables entered into the model in each step | R | Model R2 | ΔR2 | ΔF | p value | df | β |
|---|---|---|---|---|---|---|---|---|---|
| Free Speed Walking | Peak Power Absorption | 1. MVIC | .021 | .000 | .000 | .011 | .919 | 1, 24 | -.088 |
| 2. Highest Peak RFD | .521 | .271 | .271 | 8.536 | .026* | 1, 23 | -.328 | ||
| 3. Force @ Highest Peak RFD | .653 | .427 | .156 | 5.991 | .006* | 1, 22 | -.445 | ||
| Peak Power Generation | 1. MVIC | .071 | .005 | .005 | .120 | .732 | 1, 24 | .114 | |
| 2. Highest Peak RFD | .481 | .231 | .226 | 6.757 | .049* | 1, 23 | .350 | ||
| 3. Force @ Highest Peak RFD | .545 | .297 | .067 | 2.084 | .047* | 1, 22 | .290 | ||
| Fast Walking | Peak Power Absorption | 1. MVIC | .444 | .197 | .197 | 5.886 | .023* | 1, 24 | -.510 |
| 2. Highest Peak RFD | .524 | .275 | .078 | 2.473 | .129 | 1, 23 | -.090 | ||
| 3. Force @ Highest Peak RFD | .653 | .348 | .151 | 5.797 | .025* | 1, 22 | -.438 | ||
| Peak Power Generation | 1. MVIC | .492 | .243 | .243 | 7.685 | .011* | 1, 24 | .556 | |
| 2. Highest Peak RFD | .538 | .289 | .047 | 1.506 | .232 | 1, 23 | .036 | ||
| 3. Force @ Highest Peak RFD | .653 | .426 | .137 | 5.239 | .032* | 1, 22 | .416 | ||
| Functional Measures | KOOS-ADL | 1. MVIC | .535 | .286 | .286 | 9.627 | .005* | 1, 24 | .612 |
| 2. Highest Peak RFD | .559 | .313 | .026 | .883 | .357 | 1, 23 | -.054 | ||
| 3. Force @ Highest Peak RFD | .714 | .509 | .197 | 8.821 | .007* | 1, 22 | .499 | ||
| Stair Climbing Time | 1. MVIC | .629 | .396 | .396 | 15.732 | .001* | 1, 24 | -.660 | |
| 2. Highest Peak RFD | .633 | .401 | .005 | .186 | .670 | 1, 23 | .154 | ||
| 3. Force @ Highest Peak RFD | .656 | .431 | .030 | 1.165 | .292 | 1, 22 | -.195 |
*
p<0.05 indicating that a significant change in the r2 value to predict the relevant dependent variable