Test-retest Reliability of Isokinetic Knee Extension and Flexion.
From: Centre of Physiotherapy Research at the School of Physiotherapy, University of Otago, Dunedin, New Zealand. gisela.sole@otago.ac.nz
Archives of physical medicine and rehabilitation
- Publish Date: May 2007
- ISSN: 0003-9993
- Volume: 88
- Issue: 5
- Pages: 626-31
- Medium: Print
- Language: English
- Citation (JAMA): Sole Gisela, Hamrén Jonas, Milosavljevic Stephan, et al. Test-retest Reliability of Isokinetic Knee Extension and Flexion.. May 2007;88:626-31
Abstract
OBJECTIVE: To assess reliability of isokinetic peak torque and work for knee flexion and extension. DESIGN: Single-group test-retest. SETTING: University laboratory. PARTICIPANTS: Eleven men and 7 women (mean age, 21 y). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: Peak torque and work for concentric and eccentric knee extension and flexion were recorded at 60 degrees/s for 3 trials on 2 occasions. Intraclass correlation coefficient model 3,1 (ICC(3,1)), standard error (SE) of measurements, and smallest real differences were calculated for the maximum and for the mean peak torque and work of the 3 repetitions. RESULTS: Relative reliability was “very high” for peak torque and work (ICC range, >.90). The SE measurements ranged between 5% and 10% of the initial values for both peak torque and work. The smallest change that indicates a real improvement for a single subject (smallest real differences) ranged from 12% to 25% for peak torque and work variables and from 25% to 30% for the peak torque ratios. CONCLUSIONS: Isokinetic concentric and eccentric knee extensor and flexor strength variables are reliable when measured by the same examiner in asymptomatic subjects.
Mesh Headings (Keywords): Adult, Biomechanics, Exercise Test, Female, Humans, Knee Joint, Male, Movement, Muscle Contraction, Muscle, Skeletal, Reproducibility of Results, Torque
Check for Full Text / PubMed Unique Identifier (PMID): 17466732
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