Table 3.
Effect sizes and statistical power for main effects over time and between groups.
| Variables | Phase | Analysis F tests | F value | P value | Effect size (ηp2) | Statistical power |
|---|---|---|---|---|---|---|
| Medio-lateral CoP range (cm) | P1 | Time | 4.063 | .057 | .162 | .485 |
| Group | .150 | .861 | .014 | .070 | ||
| Time × Group | 1.311 | .291 | .111 | .252 | ||
| P2 | Time | .076 | .785 | .004 | .058 | |
| Group | 1.018 | .378 | .088 | .204 | ||
| Time × Group | .665 | .525 | .060 | .147 | ||
| Antero-posterior CoP range (cm) | P1 | Time | 6.314 | .020* | .231 | .669 |
| Group | .753 | .483 | .067 | .161 | ||
| Time × Group | 1.562 | .233 | .129 | .294 | ||
| P2 | Time | 7.211 | .014* | .256 | .726 | |
| Group | 5.888 | .009* | .359 | .822 | ||
| Time × Group | 4.643 | .021* | .307 | .719 | ||
| Medio-lateral CoP mean velocity (cm/s) | P1 | Time | 5.928 | .024* | .220 | .642 |
| Group | .025 | .975 | .002 | .053 | ||
| Time × Group | .738 | .490 | .066 | .158 | ||
| P2 | Time | .221 | .643 | .010 | .073 | |
| Group | .410 | .669 | .038 | .108 | ||
| Time × Group | 2.194 | .136 | .173 | .397 | ||
| Antero-posterior CoP mean velocity (cm/s) | P1 | Time | 8.994 | .007* | .300 | .816 |
| Group | .736 | .491 | .065 | .158 | ||
| Time × Group | 1.766 | .195 | .144 | .328 | ||
| P2 | Time | 6.944 | .015* | .249 | .710 | |
| Group | 1.727 | .202 | .141 | .321 | ||
| Time × Group | 5.402 | .013* | .340 | .787 | ||
| Vertical ground reaction torque (Nm) | P1 | Time | 17.259 | .000* | .451 | .977 |
| Group | 2.169 | .139 | .171 | .393 | ||
| Time × Group | 1.601 | .225 | .132 | .300 | ||
| P2 | Time | 14.046 | .001* | .401 | .946 | |
| Group | .025 | .975 | .002 | .053 | ||
| Time × Group | 2.838 | .081 | .213 | .497 | ||
| Medio-lateral CoP position within BoS (%) | P1 | Time | .574 | .457 | .027 | .112 |
| Group | 1.926 | .171 | .155 | .354 | ||
| Time × Group | 1.870 | .179 | .151 | .345 | ||
| P2 | Time | 12.194 | .002* | .367 | .914 | |
| Group | .533 | .594 | .048 | .126 | ||
| Time × Group | 1.068 | .362 | .092 | .212 | ||
| Antero-posterior CoP position within BoS (%) | P1 | Time | 4.254 | .052 | .168 | .503 |
| Group | 2.757 | .086 | .208 | .484 | ||
| Time × Group | 4.060 | .032* | .279 | .657 | ||
| P2 | Time | 9.294 | .006* | .307 | .828 | |
| Group | 2.520 | .104 | .194 | .449 | ||
| Time × Group | 7.761 | .003* | .425 | .916 |
* Indicates statistically significant difference p < 0.05.