To determine the reliability of inversion and eversion concentric isokinetic-strength measurements from the Biodex System 3 isokinetic dynamometer.
University biomechanics research laboratory.
Thirty-five volunteers free from any lower leg and ankle injuries within the preceding year.
Peak (PT) and average (AT) isokinetic torque at 30°/s and 120°/s for subtalar-joint inversion and eversion.
PT intraclass correlation coefficients (ICC2,1) ranged from .54 to .92. AT ICC2,1 ranged from .55 to .91. These ICCs were good to excellent for both PT and AT at each speed and motion tested, except for fair ICCs produced from right-foot-eversion measurements at 30°/s.
Inversion and eversion subtalar-joint strength measurements from the Biodex System 3 isokinetic dynamometer are reliable.