Note: [] Widener University, Institute for Physical Therapy Education,
One University Place, Chester, PA 19013, USA. Tel.: +1 610 499 1287; Fax: +1
610 499 1231; E-mail: Dawn.T.Gulick@Widener.edu
Abstract: {\it Purpose:} To examine the normal strength relationship between
eccentric external rotation (EccER) and concentric internal rotation (ConIR)
strength ratios of the shoulder in the dominant and non-dominant extremities of
healthy subjects. {\it Methods:} Fourteen men and sixteen women were tested in the
scapular plane using two angular velocities: 90 and 120°/s. The
dependent variables were: peak torque (PT), work per repetition (W/rep), and
total work (TW) ratios. {\it Results:} The EccER: ConIR ratio in a non-athletic population
was significantly greater (p < 0.05) for the dominant than the non-dominant
extremities for PT, W/rep, and TW. There was no significant difference in
torque production between the two-isokinetic velocities. W/rep and TW ratios
were significantly higher in females than in males. Although PT was not
statistically significant, a similar relationship existed (p=0.069). {\it Conclusion:} In a healthy, non-athletic population, when tested
at 90 or 120°/s, the EccER is just slight greater than its ConIR
counterpart in women and men alike.
