Table 1.

EMG activation of subjects with and without impingement during isokinetic abduction at 120°/s reproduced from cools et al, 2007.

Patient Group	Upper Trap Activation	Lower Trap Activation	UT:LT ratio
Involved side (impingement)	95%MVIC	48%MVIC	2.19
Involved side (Control)	73%MVIC	62%MVIC	1.23
Uninvolved side (impingement)	74%MVIC	56%MVIC	1.56
Involved side (control)	74%MVIC	62%MVIC	1.36