Table 4.
Muscle activity during foot lift task
| Mean (SD) | Tukey post hoc | |||||||
|---|---|---|---|---|---|---|---|---|
| Light | Effortful | Relax | F (p) | L vs E | E vs R | L vs R | ||
| iEMG | TFL | 0.033 (0.026) | 0.026 (0.020) | 0.024 (0.017) | 2.3 (.12) | - | - | - |
| Gmed | 0.017 (0.017) | 0.021 (0.023) | 0.022 (0.016) | 0.9 (.73) | - | - | - | |
| ExtObl | 0.020 (0.015) | 0.031 (0.022) | 0.027 (0.028) | 1.7 (.19) | - | - | - | |
| LongL3 | 0.021 (0.015) | 0.033 (0.025) | 0.018 (0.014) | 3.7 (.03) | NS | NS | NS | |
| IlioL3 | 0.016 (0.020) | 0.029 (0.027) | 0.016 (0.013) | 6.5 (.004) | * | * | NS | |
| Peak | TFL | 0.376 (0.353) | 0.406 (0.328) | 0.380 (0.355) | 1.3 (.30) | - | - | - |
| Gmed | 0.268 (0.188) | 0.270 (0.259) | 0.251 (0.230) | 1.2 (.32) | - | - | - | |
| ExtObl | 0.090 (0.053) | 0.115 (0.069) | 0.096 (0.055) | 1.2 (.002) | * | NS | NS | |
| LongL3 | 0.128 (0.118) | 0.157 (0.152) | 0.133 (0.091) | 2.3 (.12) | - | - | - | |
| IlioL3 | 0.118 (0.089) | 0.138 (0.102) | 0.122 (0.098) | 2.2 (.13) | - | - | - | |
Note: Reported values are across-participant means of each participant’s median value in each condition. iEMG = integrated electromyographic signal (total activation during trial). TFL = tensor fasciae latae. Gmed = gluteus medius. ExtObl = external oblique muscle. LongL3 = longissimus muscle at level of third lumbar vertebra (L3). IlioL3 = iliocostalis at L3 level. NS = not significant. All muscles recorded are on the stance side of the body (arbitrary units). Degrees of freedom = (2,36).
*p < .05. NS = p > .05.