Table 2.
Means and standard deviations of Valk score and force platform variables in three sessions
| Parameters | First session | Second session | Third session | F value | P value |
|---|---|---|---|---|---|
| Valk score | 15.05 ± 7.20 | 15.05 ± 7.2 | 13.47 ± 6.09 | 3.865 | 0.065 |
| CFREQ XO | 0.08 ± 0.04 | 0.09 ± 0.04 | 0.10 ± 0.06 | 1.166 | 0.323 |
| CFREQ XC | 0.11 ± 0.06 | 0.12 ± 0.09 | 0.14 ± 0.10 | 0.906 | 0.387 |
| CFREQ YO | 0.10 ± 0.04 | 0.08 ± 0.03 | 0.08 ± 0.04 | 1.655 | 0.205 |
| CFREQ YC | 0.11 ± 0.05 | 0.11 ± 0.04 | 0.14 ± 0.09 | 2.049 | 0.144 |
| POWER XO | 8.73 ± 4.37 | 7.88 ± 2.94 | 7.48 ± 3.25 | 1.331 | 0.277 |
| POWER XC | 13.04 ± 7.58 | 11.42 ± 4.77 | 11.14 ± 6.52 | 1.981 | 0.153 |
| POWER YO | 11.49 ± 6.57 | 10.68 ± 5.09 | 8.29 ± 3.95 | 6.469 | 0.004* |
| POWER YC | 13.49 ± 7.32 | 13.67 ± 0.66 | 11.70 ± 0.30 | 2.007 | 0.149 |
| 99%FREQ XO | 1.65 ± 0.32 | 1.75 ± 0.49 | 1.85 ± 0.60 | 1.011 | 0.374 |
| 99%FREQ XC | 1.84 ± 0.41 | 1.99 ± 0.52 | 1.90 ± 0.28 | 1.378 | 0.265 |
| 99%FREQ YO | 1.52 ± 0.38 | 1.62 ± 0.35 | 1.74 ± 0.29 | 4.363 | 0.020* |
| 99%FREQ YC | 1.79 ± 0.40 | 1.86 ± 0.49 | 1.86 ± 0.29 | 0.321 | 0.727 |
| P1 XO | 4.33 ± 2.14 | 3.84 ± 1.73 | 3.25 ± 1.60 | 2.203 | 0.125 |
| P1 XC | 5.34 ± 4.81 | 4.49 ± 2.80 | 3.82 ± 2.97 | 1.719 | 0.194 |
| P1 YO | 5.01 ± 4.08 | 5.40 ± 3.03 | 3.46 ± 2.12 | 3.456 | 0.052 |
| P1 YC | 5.15 ± 3.69 | 4.90 ± 2.92 | 3.84 ± 2.93 | 2.371 | 0.108 |
| P2 XO | 4.03 ± 1.84 | 3.62 ± 1.16 | 3.70 ± 1.51 | 0.644 | 0.531 |
| P2 XC | 6.12 ± 2.84 | 5.44 ± 2.07 | 5.93 ± 3.64 | 0.873 | 0.426 |
| P2 YO | 6.16 ± 3.39 | 5.16 ± 2.63 | 4.14 ± 2.01 | 6.738 | 0.003* |
| P2 YC | 7.68 ± 4.19 | 7.74 ± 4.69 | 6.17 ± 3.24 | 1.997 | 0.150 |
| P3 XO | 1.15 ± 1.34 | 0.93 ± 0.71 | 1.02 ± 0.85 | 0.687 | 0.509 |
| P3 XC | 2.18 ± 1.66 | 1.82 ± 1.40 | 1.85 ± 1.03 | 1.660 | 0.204 |
| P3 YO | 1.21 ± 1.03 | 1.02 ± 0.55 | 1.12 ± 0.58 | 0.988 | 0.382 |
| P3 YC | 1.58 ± 0.94 | 1.66 ± 1.07 | 1.83 ± 1.30 | 0.688 | 0.509 |
| P4 XO | 0.27 ± 0.19 | 0.30 ± 0.21 | 0.29 ± 0.25 | 0.549 | 0.583 |
| P4 XC | 0.77 ± 1.11 | 0.66 ± 0.48 | 0.64 ± 0.70 | 0.573 | 0.569 |
| P4 YO | 0.33 ± 0.22 | 0.38 ± 0.23 | 0.44 ± 0.30 | 3.183 | 0.076 |
| P4 YC | 0.85 ± 0.60 | 0.87 ± 0.63 | 0.81 ± 0.62 | 0.297 | 0.745 |
XO Anterior-posterior direction with open eyes, XC Anterior-posterior direction with closed eyes, YO Medial- lateral direction with open eyes, YC Medial- lateral direction with closed eyes, POWER Total frequency power (HZ), 99% FREQ 99% power frequency (HZ), CFREQ centroidal frequency (HZ), P1: 0.01-0.1 (HZ), P2: 0.1-0.5 (HZ), P3: 0.5-1 (HZ), P4: 1-3 (HZ) power density. Statistically significant differences between sessions (P <0.05): asterisk.