Affiliations: [a] Department of Sport Science and Kinesiology, Christian
Doppler Laboratory, University of Salzburg, Hallein-Salzburg, Austria
Note: [] Address for correspondence: Johannes Dirnberger, Department of
Sport Science and Kinesiology, University of Salzburg, 49 Rifer Schlossallee,
Hallein-Salzburg, 5020, Austria. Tel.: +43 0 660 549 4195; Fax: +43 0 662 6389
4881; E-mail: [email protected]
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.
Keywords: Reproducibility, isometric and isokinetic maximum strength testing, knee flexion and extension, IsoMed 2000-dynamometer
