Materials and methods. – The mean patient age was 24.8 (range: 16–47). We analysed the impact of instability on rotator muscle performance
according to the side (dominant or non-dominant), the number of dislocations and the severity of any associated bone damage. The isokinetic
analysis was performed at least one month after the last shoulder dislocation. The same operator performed all procedures. The modified Davies
position was adopted, in order to record the peak torque of the internal and external rotators during concentric contractions at 608 and 1808 per
second. Means and standard deviations for peak torque to body weight ratios and external/internal rotator peak torque ratios were reported