The results of the descriptive statistical analyses are summarised in table 1 for the isokinetic peak force values and agonist/antagonist ratios at both speeds for both sides, in table 2 for the EMG activity of the three trapezius muscles and serratus anterior muscle during isokinetic protraction at both speeds for both sides, and in table 3 for the EMG activity of the same muscles during isokinetic retraction.
The statistical analysis with paired t tests revealed significantly lower isokinetic protraction peak force on the injured side at high velocity (p,0.05) compared with the non-injured side, a significantly lower protraction/retraction ratio at low velocity for the injured shoulder (p,0.01), and significantly less EMG activity in the lower trapezius during isokinetic retraction at high velocity on the injured side (p,0.05).