Table 4.
Change score correlations (r) for low back discomfort and low back angle, pelvis movement and muscle fatigue amplitude (A) and median frequency (MF) measures over 2 h prolonged sitting.
| Low Back Discomfort | Usual Sit (Mean Sagittal) | Usual Sit (SD Sagittal) | Erector Spinae (A) | Erector Spinae (MF) | External Oblique (A) | External Oblique (MF) | Pelvis Movement | |
|---|---|---|---|---|---|---|---|---|
| Low Back Discomfort, r | 1.000 | |||||||
| Usual Sit (Mean Sagittal), r | −0.269 | 1.000 | ||||||
| (p Value) | 0.252 | |||||||
| Usual Sit (SD Sagittal), r | 0.297 | −0.422 | 1.000 | |||||
| (p Value) | 0.204 | 0.064 | ||||||
| Erector Spinae (A), r | −0.140 | −0.290 | 0.477 | 1.000 | ||||
| (p Value) | 0.569 | 0.229 | 0.039 | |||||
| Erector Spinae (MF), r | 0.374 | −0.175 | −0.263 | −0.489 | 1.000 | |||
| (p Value) | 0.115 | 0.474 | 0.277 | 0.034 | ||||
| External Oblique (A), r | 0.170 | 0.153 | 0.058 | 0.036 | −0.117 | 1.000 | ||
| (p Value) | 0.530 | 0.571 | 0.831 | 0.894 | 0.665 | |||
| External Oblique (MF), r | −0.533 | 0.427 | −0.123 | 0.058 | −0.461 | −0.175 | 1.000 | |
| (p Value) | 0.028 | 0.087 | 0.638 | 0.824 | 0.062 | 0.516 | ||
| Pelvis Movement, r | 0.380 | −0.310 | 0.760 | 0.582 | −0.348 | 0.079 | −0.014 | 1.000 |
| (p Value) | 0.098 | 0.184 | < 0.001 | 0.009 | 0.144 | 0.772 | 0.959 |