Abstract
The present study was conducted to evaluate the relative and absolute reproducibility of the IsoMed 2000-dynamometer in measuring Peak Torque (PT) during maximum isometric and isokinetic (60 and 120°/s) knee flexion and extension. Thirty four physically active male subjects (mean age: 23.2 years) were measured in three sessions (T1–T3), 48–72 h apart. Repeated measures analysis of variance(ANOVA) with Bonferroni post hoc adjustments revealed significant systematic errors for isokinetic flexion measurements with mean values on the second and third visit being around 3–5% than the corresponding values obtained in the first visit. Intraclass correlation coefficients (ICC 2,1) of 0.90–0.98 and 0.94–0.98 combined with values of standard error of measurement (SEM) of 5.5–9.1 and 4.0–9.0 Nm were found for T1–T2 and T2–T3, respectively. Based on the systematic errors found for flexor measurements and a clear improvement in reproducibility parameters from T1–T2 to T2–T3 for nearly all measurements, we recommend the use of a familiarisation session prior to actual testing.