Electromyographical Comparison of Four Common Shoulder Exercises in Unstable and Stable Shoulders
Table 1
Scaption descriptive analysis with mean (Mn) and standard deviation (SD) values reported divided into eight arcs. The results of each Kruskal-Wallis test are presented at the end of each column for the respective muscle and arc.
0–
30–
60–
90–
120–
90–
60–
30–
Mn
Sd
Mn
Sd
Mn
Sd
Mn
Sd
Mn
Sd
Mn
Sd
Mn
Sd
Mn
Sd
Supraspinatus
H
23
(10)
33
(12)
40
(12)
41
(12)
31
(9)
25
(7)
19
(6)
11
(5)
GL
27
(10)
39
(12)
46
(15)
46
(14)
35
(12)
29
(7)
22
(4)
14
(4)
MDI
24
(11)
32
(10)
40
(12)
42
(13)
31
(9)
25
(8)
18
(8)
11
(7)
AI
22
(12)
33
(18)
36
(17)
38
(18)
28
(14)
23
(12)
18
(10)
11
(9)
=
0.73
0.37
0.39
0.71
0.53
0.24
0.56
0.36
Infraspinatus
H
11
(4)
20
(7)
27
(11)
29
(13)
20
(8)
16
(6)
12
(5)
6
(3)
GL
18
(10)
29
(14)
42
(19)
47
(20)
34
(21)
28
(16)
19
(10)
10
(6)
MDI
10
(12)
21
(18)
33
(29)
39
(33)
25
(22)
19
(20)
12
(15)
5
(11)
AI
14
(4)
24
(8)
32
(11)
37
(13)
28
(11)
23
(11)
15
(7)
8
(3)
=
0.17
0.37
0.28
0.42
0.30
0.26
0.22
0.22
Teres major
H
1
(4)
2
(4)
2
(6)
2
(6)
1
(4)
0
(4)
0
(3)
0
(3)
GL
10
(25)
13
(25)
6
(6)
8
(11)
4
(5)
4
(4)
4
(3)
3
(3)
MDI
1
(2)
2
(3)
2
(2)
4
(6)
5
(9)
2
(5)
0
(2)
0
(2)
AI
1
(1)
2
(1)
2
(2)
3
(2)
2
(1)
1
(1)
1
(1)
1
(1)
=
0.32
0.11
0.38
0.51
0.54
0.24
0.02*
0.06
Middle deltoid
H
11
(7)
20
(12)
33
(15)
47
(14)
31
(9)
19
(6)
12
(6)
6
(4)
GL
9
(5)
16
(7)
25
(14)
36
(19)
24
(12)
16
(8)
9
(5)
4
(3)
MDI
8
(5)
19
(10)
32
(12)
39
(12)
24
(6)
17
(6)
12
(7)
4
(3)
AI
9
(4)
18
8
30
(12)
43
(19)
27
(11)
18
(6)
11
(3)
5
(3)
=
0.90
0.94
0.53
0.44
0.33
0.87
0.59
0.32
Upper trapezius
H
23
(12)
33
(14)
40
(16)
43
(12)
30
(8)
22
(8)
16
(7)
8
(8)
GL
21
(10)
34
(17)
41
(21)
41
(15)
29
(11)
23
(11)
16
(6)
10
(5)
MDI
18
(7)
27
(13)
37
(18)
39
(20)
27
(14)
20
(11)
14
(7)
8
(6)
AI
14
(8)
25
(10)
35
(13)
38
(16)
25
(13)
18
(8)
12
(5)
6
(4)
=
0.16
0.55
0.87
0.79
0.43
0.81
0.36
0.32
Serratus anterior
H
24
(14)
42
(21)
59
(20)
63
(18)
42
(17)
29
(13)
14
(12)
5
(5)
GL
20
(18)
33
(22)
46
(23)
49
(21)
32
(15)
24
(13)
13
(12)
5
(7)
MDI
12
(7)
24
(10)
38
(11)
44
(15)
28
(9)
20
(6)
10
(7)
4
(5)
AI
13
(13)
27
(22)
37
(22)
45
(27)
28
(15)
19
(12)
10
(10)
3
(4)
=
0.23
0.21
0.09
0.09
0.23
0.33
0.84
0.66
*Indicates significant difference between groups. H: Healthy.
