Shoulder Internal and External Rotation Peak Torque Production through a Velocity Spectrum in Differing

The purpose of this study was to explore alternative positions for isokinetic testing of shoulder internal and external rotation. Peak torque of shoulder internal and external rotation was measured with a CybeP dynamometer in 20 normal young right-handed males. Peak torques of subjects' right shoulders were measured in six different shoulder positions and three different velocities (60, 180, and 300 degrees /sec). Each subject made three movements at each of the 18 position/velocity combinations and a mean peak torque was found for each combination. Differences in peak torque for internal and external rotation due to position and velocity were tested separately with a 2-way ANOVA and Duncan Multiple Range Test (p = 0.05). Peak torque values were significantly different among the three velocities for all test positions. Significant differences were found among the six test positions. Although the highest peak torques were significantly greater than the lowest, there were no consistent differences between the Cybex recommended positions and the alternative positions. J Orthop Sports Phys Ther 1987;8(11):518-524.