Correlation analysis between pain VAS and muscle contractions
| Variable | Muscle | |||||||
|---|---|---|---|---|---|---|---|---|
| Upper trapezius | Biceps brachii | Rectus femoris | ||||||
| Pearson coefficient | Probability | Pearson coefficient | Probability | Pearson coefficient | Probability | |||
| Total contraction | 0.004 | 0.980 | −0.061 | 0.708 | −0.282 | 0.077 | ||
| Contraction of over 20% of MVIC | ||||||||
| Events | 0.216 | 0.181 | −0.185 | 0.252 | −0.135 | 0.406 | ||
| Mean duration (sec) | −0.613 | 0.143 | −0.514 | 0.376 | −0.158 | 0.517 | ||
| MVIC rate (%) | ||||||||
| Maximum | 0.049 | 0.917 | −0.260 | 0.673 | −0.358 | 0.132 | ||
| Mean±SD | 0.641±−0.223 | 0.121±0.631 | −0.038±−0.683 | 0.952±0.204 | −0.055±−0.103 | 0.824±0.674 |
VAS: visual analogue scale, MVIC: maximal voluntary isometric contraction, SD: standard deviation.
