Table 3.
Variables measured during the balance task
| Variable | IG (n=11) | CG (n=11) |
|---|---|---|
| COP displacement | ||
| A–P displacement (mm) | 355.4±159.7 | 397.7±219.6 |
| M–L displacement (mm) | 154.4±45.8 | 139.8±50.4 |
| Total length (mm) | 581.5±224.3 | 576.1±374.4 |
| RA (mm2) | 129.2±59.8 | 134.2±110.5 |
| Distribution of plantar pressure | ||
| APP (kg/cm2) | 3.54±1.45 | 3.16±1.51 |
| PPP (kg/cm2) | 2.25±0.89 | 2.60±1.85 |
| MPP (kg/cm2) | 1.98±1.07 | 4.58±3.21* |
| LPP (kg/cm2) | 3.47±1.64 | 3.86±2.42 |
| PPP/APP ratio (%) | 93.5±45.0 | 79.8±40.9 |
| LPP/MPP ratio (%) | 203.1±91.7 | 121.6±69.4* |
| Muscle activity | ||
| FL (%RMS) | 65.5±40.9 | 98.9±24.9* |
| TA (%RMS) | 52.2±11.5 | 41.6±24.1 |
| GASTRO (%RMS) | 221.7±149.2 | 166.0±96.7 |
| TA/FL ratio (%) | 91.9±31.1 | 47.1±31.9* |
| TA/GASTRO ratio (%) | 466.2±338.7 | 585.8±492 |
Notes:
*
p<0.05. All results are shown by mean ± standard deviation.
Abbreviations: IG, instability group; CG, control group, COP, center of pressure; A–P, anterior–posterior; M–L, medial–lateral; RA, rectangle area; APP, anterior plantar pressure; PPP, posterior plantar pressure; MPP, medial plantar pressure; LPP, lateral plantar pressure; FL, fibularis longus; RMS, root mean square; TA, tibialis anterior; GASTRO, gastrocnemius.