Isokinetic muscle torque during glenohumeral rotation in dominant and nondominant limbs

The purpose of this study was to evaluate the side-to-side differences of isokinetic muscle torque during shoulder rotation in healthy nonathletic subjects. The strength was examined at two angles of glenohumeral abduction in the scapular plane (45° and 90°, respectively) and at three velocities (180°/s, 120°/s, 60°/s) using Biodex System 3Pro dynamometer. The maximal torques were achieved on dominant side in 45° abduction at 60°/s velocity, both for external and internal rotation. A general pattern was observed: abduction angle and velocity increase provoked a decrease in torque values, but each antagonistic muscle group was sensitive to a different factor. Significant differences between dominant and non-dominant limb were not observed in nonathletic male.