Table 3 Comparison of the relative contribution of shoulder muscle activity between groups according to loads (%)
| Â | Upper trapezius | Serratus anterior | Lower trapezius | Middle deltoid | ||||
|---|---|---|---|---|---|---|---|---|
Loads | UT paina | Control | UT pain | Control | UT pain | Control | UT pain | Control |
25% | 25.3 ± 8.6 | 25.2 ± 7.2 | 25.0 ± 6.2 | 19.5 ± 6.0 | 22.6 ± 9.1 | 21.5 ± 11.2 | 27.1 ± 8.5 | 33.7 ± 12.6 |
50% | 26.1 ± 6.8 | 25.8 ± 8.2 | 23.3 ± 6.3 | 19.7 ± 5.9 | 22.6 ± 9.2 | 20.8 ± 8.5 | 28.1 ± 9.4 | 33.7 ± 10.8 |
75% | 28.8 ± 6.9 | 27.9 ± 7.4 | 22.6 ± 5.6 | 20.3 ± 5.3 | 19.4 ± 8.8 | 19.9 ± 8.0 | 29.2 ± 9.1 | 31.8 ± 9.5 |
Interaction effect | F = 0.16, p = 0.85 |  F = 2.01, p = 0.16 |  F = 2.07, p = 0.15 |  F = 2.09, p = 0.15 | ||||
Main effect | Â | Â | Â | Â | ||||
Groups | F = 0.04, p = 0.85 |  F = 4.86, p = 0.04* | F = 0.12, p = 0.73 |  F = 3.27, p = 0.08 | ||||
Loads | F = 12.35, p = 0.000* | F = 2.31, p = 0.12 |  F = 11.08, p = 0.000* | F = 0.27, p = 0.77 | ||||