title: Reliability of the Lido Linea closed kinetic chain isokinetic dynamometer.
abstract: Due to increasing emphasis on closed kinetic chain exercises in rehabilitation, there is a need to objectively quantify their effectiveness. The purpose of this study was to determine the test-retest reliability of the peak force and total work scores during a concentric isokinetic leg press pattern using the Lido Linea closed kinetic chain isokinetic dynamometer. The static calibration of force measurements was established by hanging a series of certified weights from a lever arm of known length affixed to the system's force measurement shafts. A repeated-trials, multiple-day experimental paradigm was utilized to establish the static calibration procedure's reliability. No significant difference was found between expected and observed force scores (p > .05). Thirty healthy, active subjects (22.5 +/- 3.9 years) performed concentric isokinetic leg press exercise under maximal voluntary conditions across a velocity spectrum of 25.4, 50.8, and 76.2 cm/sec (10, 20, and 30 inch/sec) in a test-retest experimental paradigm, separated by 24-72 hours. Intraclass correlation coefficient values (ICC 2,1) across Day 1 and Day 2 for peak force and total work ranged from 0.87 to 0.94 (p < .05). The data indicate that the Lido Linea closed kinetic chain isokinetic dynamometer is an appropriate instrument for assessing concentric isokinetic performance during a closed kinetic chain leg press pattern.
authors.affiliation: Department of Physical Therapy, University of Wisconsin-La Crosse, USA.
authors.forename: G J
authors.initials: GJ
authors.lastname: Davies
authors.forename: B C
authors.initials: BC
authors.lastname: Heiderscheit
mesh_terms: D000328:Adult; D005081:Exercise Therapy / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000502:physiology; D007866:Leg / Q000502:physiology*; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D016059:Range of Motion, Articular; D015203:Reproducibility of Results