Table 1.
Jumping height and ground reaction force.
| Condition / p value | EO | EC | p value |
|---|---|---|---|
| Jumping heights (cm) | 9.9 ± 3.7 | 9.1 ± 2.8 | 0.004* |
| Maximum ground reaction forces (N/kg) | |||
| Fx | 1.6 ± 0.4 | 2.0 ± 1.0 | 0.049* |
| Fy | 0.8 ± 0.2 | 0.8 ± 0.2 | 0.356 |
| Fz | 25.9 ± 2.6 | 26.7 ± 2.4 | 0.010* |
| Maximum ground reaction forces (N/kg/jumping height) | |||
| Fx | 0.17 ± 0.01 | 0.23 ± 0.10 | 0.007* |
| Fy | 0.08 ± 0.04 | 0.10 ± 0.05 | 0.165 |
| Fz | 2.78 ± 0.58 | 3.12 ± 0.75 | <0.001* |
| Impulses (N/kg) | |||
| 597 ± 68 | 627 ± 80 | <0.001* | |
| Impulses (N/kg/jumping height) | |||
| 70.1 ± 19.8 | 73.7 ± 22.0 | <0.001* | |
| Times from IC to peak ground reaction forces (ms) | |||
| Fx | 79 ± 25 | 77 ± 27 | 0.633 |
| Fy | 164 ± 89 | 136 ± 94 | 0.326 |
| Fz | 146 ± 28 | 149 ± 28 | 0.938 |
EO: eyes-open, EC: eyes-closed, Fx: medial-lateral ground reaction force, Fy: anterior-posterior force, Fz: vertical force, Asterisks (*): Significant difference between EO and EC