Akademik Veri Yönetim Sistemi
Journal of Rheumatology and Medical Rehabilitation, cilt.17, sa.2, ss.91-97, 2006 (Scopus)
This study was designed to determine the test-retest reliability of isokinetically measured resistance to passive knee flexion and extension movements performed at different angular velocities, and to assess the effects of different hip angles on these measurements. Thirty-five healthy volunteers between 21 and 39 years of age were included in the study. Measurements of resistance to passive knee flexion and extension movements at 60, 120, 180 and 300°/s were recorded twice in the sitting position (hip at 90° flexion) with a 20-minute interval between the two tests. The following day, the same test-re-test procedures were carried out with the subject in supine position (hip fully extended). The intraclass correlation coefficients for the test-retest results in the sitting and supine positions ranged from 0.40-0.62 and from 0.21-0.64, respectively. Comparison of the first measurements in the sitting versus the supine position showed no significant difference at any velocity (p > 0.05 for all), and the same was true for inter-group comparisons of the second measurements (p > 0.05 for all). In all tests at all velocities, the first flexion-extension movement in each set showed the highest peak torque. Overall, the results indicated fair-to-good reliability for the two test occasions in the same test position. The exceptions were extension at 60°/s and flexion at 120°/s, which were not reliable. Hip angle had no effect on the peak torque values. To achieve reliable test results, if technically possible the peak torque of the first-likely reflex movement in each set should be omitted. Before planning an investigation of passive resistance to motion in a given patient group, a reliability study should be conducted on individuals with the disease of interest.