Table 4. Body sway and stamping parameters. Values are mean (SD). |
|
Baseline |
1h |
24h |
48h |
72h |
96h |
120h |
Time
effect (p) |
| Body sway |
| V∑, mm/s |
30.5 (5.1) |
30.9 (6.4) |
30.1 (5.4) |
30.0 (4.9) |
29.8 (4.8) |
29.2 (5.1) |
29.1 (4.7) |
.765 |
| Va-p, , mm/s |
17.6 (2.9) |
17.5 (3.3) |
16.9 (3.1) |
16.9 (2.7) |
16.8 (2.8) |
16.3 (2.4) |
16.4 (3.0) |
.233 |
| Vm-l, mm/s |
21.5 (4.0) |
22.1 (5.2) |
21.6 (4.3) |
21.5 (4.1) |
21.3 (4.0) |
21.0 (4.4) |
20.9 (3.4) |
.410 |
| Aa-p, mm |
10.2 (1.6) |
10.3 (1.9) |
10.2 (1.8) |
10.1 (1.7) |
10.2 (2.0) |
9.9 (1.2) |
9.6 (1.3) |
.454 |
| Am-l, mm |
13.1 (1.7) |
13.6 (2.2) |
13.1 (1.8) |
13.0 (2.0) |
13.3 (1.7) |
13.0 (1.6) |
13.2 (.9) |
.411 |
| Fa-p, Hz |
.386 (.068) |
.365 (.102) |
.355 (.090) |
.366 (.102) |
.348 (.101) |
.340 (.082) |
.354 (.100) |
.385 |
| Fm-l, Hz |
.482 (.101) |
.517 (.120) |
.518 (.107) |
.500 (.137) |
.534 (.113) |
.520 (.145) |
.518 (.105) |
.274 |
| 90% elipse, mm2 |
142 (48) |
159 (65) |
129 (36) |
127 (36) |
127 (37) |
126 (25) |
120 (25) |
.054 |
| Stamping |
| Mean freq., Hz |
9.3 (.9) |
9.1 (.9) |
8.7 (.7) |
8.9 (.7) |
9.1 (.9) |
9.0 (.7) |
9.1 (.8) |
.054 |
| Peak force, N/kg |
13.7 (1.1) |
13.5 (.9) |
13.7 (0.9) |
13.5 (1.0) |
13.5(.8) |
13.4 (.7) |
13.4 (.8) |
.232 |
|
V, velocity of the resultant COP movement; V, velocity in anterior-posterior directions; V velocity in medial-lateral directions; A, amplitudes of the COP sway in medial-lateral directions; A, amplitudes of the COP sway in anterior-posterior directions; F frequencies of oscillation in medial-lateral directions; F, frequencies of oscillation in anterior-posterior directions; 90% elipse, area of the elipse that contains 90% of the COP data. |
* p ≤ 0.05 t-tests compared to Baseline. |
|