Table 3 The percentage of standardized weighted EMG (%sEMG) within all seven muscles (i.e., middle deltoid, anterior deltoid, supraspinatus, upper trapezius, posterior deltoid, infraspinatus, and pectoralis major) regarding comprehensive shoulder positions
Position no. | Abduction (degrees) | Horizontal flexion (degrees) | Rotation | Middle deltoid | Anterior deltoid | Supraspinatus | Upper Trapezius | Posterior deltoid | Infra Spinatus | Pectoralis major |
|---|---|---|---|---|---|---|---|---|---|---|
1 | 30 | 0 | IR | 15.0 (7.5) | 10.7 (8.9) | 11.3 (4.5) | 6.7 (5.3) | 9.7 (4.0) | 4.8 (7.2) | 2.7 (1.7) |
2 | 30 | 0 | ER | 7.8 (4.3) | 6.7 (5.5) | 11.7 (5.2) | 8.4 (6.4) | 4.2 (2.5) | 4.7 (2.7) | 2.5 (1.5) |
3 | 30 | 30 | IR | 9.2 (4.6) | 7.9 (7.9) | 9.5 (4.1) | 8.9 (7.4) | 5.5 (2.6) | 2.7 (1.3) | 2.7 (1.8) |
4 | 30 | 30 | ER | 3.6 (2.6) | 6.8 (4.0) | 9.3 (4.3) | 9.2 (8.0) | 2.2 (3.0) | 7.3 (11.9) | 2.7 (1.6) |
5 | 30 | 60 | IR | 8.3 (7.7) | 6.9 (5.6) | 10.2 (9.3) | 14.7 (29.6) | 3.5 (3.5) | 4.4 (8.3) | 3.0 (1.8) |
6 | 30 | 60 | ER | 2.0 (1.1) | 6.4 (3.6) | 7.2 (6.4) | 7.5 (8.2) | 1.0 (0.5) | 4.4 (2.8) | 3.2 (2.0) |
7 | 30 | SP | IR | 11.2 (5.1) | 9.1 (7.4) | 10.4 (5.0) | 10.8 (11.6) | 6.4 (2.5) | 2.8 (1.1) | 2.7 (1.7) |
8 | 30 | SP | ER | 3.9 (2.1) | 7.6 (4.5) | 9.7 (4.8) | 9.4 (8.4) | 1.8 (1.2) | 5.1 (2.8) | 2.7 (1.5) |
9 | 60 | 0 | IR | 29.7 (14.0) | 22.5 (16.3) | 20.1 (8.3) | 14.0 (9.3) | 19.2 (7.1) | 5.9 (2.4) | 2.8 (1.8) |
10 | 60 | 0 | ER | 12.7 (5.7) | 12.7 (8.1) | 17.0 (7.1) | 16.0(11.2) | 5.9 (3.8) | 7.2 (5.9) | 2.7 (1.6) |
11 | 60 | 30 | IR | 18.4 (6.2) | 16.3 (12.8) | 16.9 (6.7) | 15.4 (10.6) | 10.9 (4.0) | 5.4 (2.7) | 3.8 (4.6) |
12 | 60 | 30 | ER | 9.2 (2.7) | 12.7 (5.2) | 14.5 (4.7) | 17.3(13.6) | 4.4 (6.5) | 8.4 (6.0) | 4.3 (7.1) |
13 | 60 | 60 | IR | 13.2 (7.6) | 14.2 (11.3) | 14.8 (8.2) | 13.8 (11.3) | 7.4 (3.6) | 9.2 (7.8) | 6.7 (8.5) |
14 | 60 | 60 | ER | 8.8 (3.3) | 14.9 (5.4) | 12.3 (6.5) | 15.6(11.0) | 2.9 (1.7) | 7.3 (2.8) | 4.3 (2.4) |
15 | 60 | SP | IR | 21.5 (9.8) | 18.2 (12.6) | 17.6 (7.1) | 14.7 (9.6) | 13.1 (6.2) | 8.2 (11.0) | 2.9 (1.7) |
16 | 60 | SP | ER | 9.8 (3.3) | 13.1(5.7) | 15.6 (6.2) | 16.6(10.8) | 3.6 (1.7) | 7.8 (5.1) | 2.9 (1.6) |
17 | 90 | 0 | IR | 39.9 (13.4) | 30.9 (17.6) | 27.1 (11.9) | 20.9 (13.8) | 24.8 (10.1) | 8.3 (4.0) | 2.9 (1.6) |
18 | 90 | 0 | ER | 17.2 (8.1) | 18.3(12.5) | 22.1 (9.9) | 20.4(13.7) | 8.2 (5.6) | 7.6 (4.5) | 3.3 (3.2) |
19 | 90 | 30 | IR | 31.7 (11.3) | 25.6 (17.4) | 22.7 (9.5) | 21.4 (13.5) | 18.8 (8.2) | 7.9 (3.2) | 3.0 (1.7) |
20 | 90 | 30 | ER | 15.1 (5.9) | 17.5 (9.5) | 18.6 (7.5) | 22.1(14.7) | 5.3 (1.7) | 8.5 (3.9) | 3.3 (2.1) |
21 | 90 | 60 | IR | 23.2 (8.8) | 20.9 (11.1) | 20.3 (10.3) | 22.3 (14.7) | 11.8 (4.4) | 9.6 (6.0) | 3.2 (1.8) |
22 | 90 | 60 | ER | 14.8 (4.8) | 19.9 (7.8) | 15.6 (6.5) | 23.7(20.0) | 4.7 (1.6) | 10.7 (8.7) | 4.3 (3.2) |
23 | 90 | SP | IR | 32.1 (13.0) | 26.1 (17.6) | 24.3 (11.8) | 21.6 (14.7) | 18.9 (9.2) | 8.4 (4.1) | 3.0 (1.7) |
24 | 90 | SP | ER | 15.7 (7.1) | 17.5 (8.0) | 19.7(10.1) | 21.2(13.3) | 5.9 (2.4) | 8.5 (4.4) | 3.0 (1.6) |