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Table 3 Mean differences (Mean diff.) 95% confidence intervals (95%CI) and statistical significance of differences in Upper Trapezius %MVC(EMG) activity between subjects with (Subjects) and without (Controls) SIS.

From: The impact of subacromial impingement syndrome on muscle activity patterns of the shoulder complex: a systematic review of electromyographic studies

Author

Task

Torque as %MVC(EMG)

Subjects

Controls

Mean Diff.

95%CI

Stat. sig.

 

Concentric Scaption

     

Ludewig

< 60°

No load

22.5 ± 13.1

17.1 ± 10.9

5.40

-1.3, 12.1

0.11

Ludewig

 

2.3 kg

36.9 ± 18.7

31.1 ± 15.5

5.80

-3.7, 15.3

0.23

Ludewig

 

4.6 kg

56 2 ± 4.9

53.7 ± 22.6

2.30

-10.8, 15.5

0.73

Bandholm

 

20% MVC

13.8 ± 2.7

17.2 ± 6.3

-3.27

-7.8, 1.21

0.15

Bandholm

 

27.5% MVC

16.7 4 ± 8

20.4 ± 6.25

-3.70

-8.9, 1.45

0.16

Bandholm

 

35% MVC

21.8 ± 6.32

24.3 ± 7.8

-2.50

-9.1, 4.1

0.46

Ludewig

61-90°

No load

29.0 ± 13.7

22.6 ± 10.9

6.40

-0.5, 13.3

0.07

Ludewig

 

2.3 kg

48.4 ± 21.5

39.5 ± 14.2

8.90

-1.2, 19.0

0.08

Ludewig

 

4.6 kg

76.5 ± 26.0

65.2 ± 21.8

11.30

-2.0, 24.6

0.10

Ludewig

> 90°

No load

31.5 ± 13.9

25.5 ± 10.9

6.00

-0.9, 12.9

0.09

Ludewig

 

2.3 kg

47.4 ± 20.3

42.6 ± 14.6

4.80

-5.0, 14.6

0.34

Ludewig

 

4.6 kg

77.3 ± 22.5

66.8 ± 20.0

10.5

-1.3, 22.3

0.08

Bandholm

 

20% MVC

24.3 ± 8.13

24.4 ± 8.6

-0.04

-7.6, 7.7

0.99

Bandholm

 

27.5% MVC

31.0 ± 10.5

33.4 ± 12.4

-2.43

-13.0, 8.2

0.65

Bandholm

 

35% MVC

42.6 ± 14.5

46.6 ± 16.7

-3.97

-18.5, 10.4

0.59

Cools

Isokinetic abduction

94.7 ± 27

73 1 ± 9.4

-21.72

-32.7, -10.8

*<0.001

Cools

Isokinetic external

70.5 ± 18.9

45.2 ± 12.2

-25.30

-17.9, 32.7

*<0.001

 

Rot'n

     
 

Eccentric Scaption

     

Bandholm

< 60°

20% MVC

15.6 ± 4.9

15.0 ± 5.9

0.59

-4.4, 5.6

0.82

Bandholm

 

27.5% MVC

20.2 ± 5.8

21.2 ± 5.6

-0.99

-6.3, 4.3

0.71

Bandholm

 

35% MVC

24.3 ± 6.3

28.0 ± 6.3

-3.78

-9.6, 2.1

0.20

Bandholm

> 90°

20% MVC

19.9 ± 6.6

19.6 ± 8.3

0.32

-6.6, 7.2

0.93

Bandholm

 

27.5% MVC

25.9 ± 6.7

28.2 ± 9.8

-2.3

-10.0, 5.4

0.56

Bandholm

 

35% MVC

36.8 ± 11.0

41.2 ± 12.0

-4.39

-15.0, 6.2

0.42

Morais Faria

160-0°

No load

16.8 ± 9.3

18.4 ± 8.5

-1.60

-9.4, 6.2

0.69

 

Wheelchair transfers

     

Findley

0-30

Towards

5.8 ± 4.6

9.2 ± 7.5

-3.40

-8.9, 2.0

0.22

 

31-60

unaffected

6.7 ± 11.5

7.3 ± 7.5

-0.60

-9.0, 7.8

0.89

 

> 61

limb

15.3 ± 22.4

7.8 ± 5.0

7.50

-18.0, 33.0

0.56

 

0-30

Towards

8.0 ± 9.9

5.5 ± 4.1

2.50

-5.8, 10.8

0.56

 

31-60

affected

9.5 ± 8.5

9.9 ± 18.4

-0.40

-11.1, 10.3

0.94

 

> 61

limb

4.3 ± 2.4

8.6 ± 5.7

-4.30

-7.7, -0.9

*0.01