Affiliations: [a] Sports Medical Center Papendal, Arnhem, The
Netherlands | [b] Research Group Lifestyle and Health University of
Applied Sciences, Utrecht, The Netherlands
Note: [] Address for correspondence: Robert van Cingel, Sport Medical
Center Papendal, Papendallaan 7, 6816 VD Arnhem, The Netherlands. Tel.: +31 26
4834440; Fax: +31 26 4834439; E-mail: [email protected]
Abstract: The isokinetic strength of ankle inversion-eversion was twice
tested, over a period of one week, by the same examiner in apparently healthy
15 women and 15 men at 30 and 120°/s. Test – retest
measurements were examined for 1 and 3 sets of three repetitions. Intraclass
correlation coefficients for the highest peak torque out of 1 set of 3
repetitions varied from 0.47–0.82 for men and 0.70–0.94 for women. The ICC
for the mean-based PT (the 3 highest PTs out of 3 sets of 3 replicates) ranged
0.74–0.83 for men and 0.80–0.97 for women. Bland-Altman plots have indicated
a largely homoscedastic distribution of the test-retest parameters. The
standard error of measurement (SEM) varied from 3.6–7.00 Nm for men and
3.3–4.7 Nm for women (highest PT-based) and 2.9–5.7 Nm for men and
1.6–4.0 Nm for women (mean PT-based). Irrespective of either paradigm, there
was much dispersion in the ICCs for both genders in other isokinetic parameters
such as the time to PT and angle at PT. It is therefore concluded that the only
reproducible isokinetic parameter under this test protocol is the peak
torque.
Keywords: Isokinetics, ankle, reproducibility of results
