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Related Experiment Videos

Intramachine and intermachine reliability for selected dynamic muscle performance tests

W D Bandy1, S McLaughlin

  • 1Department of Physical Therapy, University of Central Arkansas, Conway 72035-0001.

The Journal of Orthopaedic and Sports Physical Therapy
|November 1, 1993
PubMed
Summary
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The new Cybex 6000 isokinetic dynamometer shows high intramachine reliability (above .90) and moderate intermachine reliability when compared to the Cybex II (ranging from .72 to .89). This study validates its performance for clinical use.

Area of Science:

  • Biomechanics
  • Rehabilitation Engineering
  • Sports Medicine

Background:

  • The Cybex 6000 isokinetic dynamometer lacks published reliability data.
  • Manufacturer claims consistency with older Cybex II systems.

Purpose of the Study:

  • Assess intramachine reliability of the Cybex 6000.
  • Evaluate intermachine reliability between Cybex 6000 and Cybex II.

Main Methods:

  • Collected peak torque, work, and power data on Cybex 6000; peak torque on Cybex II.
  • Tested 20 volunteers (10 male, 10 female) for knee flexion/extension.
  • Utilized three testing sessions over 3 weeks at 60, 180, 300 deg/sec, analyzed with intraclass correlations.

Main Results:

Related Experiment Videos

  • Intramachine reliability for Cybex 6000: majority of correlation coefficients > .90.
  • Intermachine reliability (Cybex 6000 vs. Cybex II): correlation coefficients .72–.89.

    • Conclusions:

    • Cybex 6000 demonstrates high reliability in test-retest scenarios.
    • Moderate reliability observed when comparing Cybex 6000 to Cybex II.
    • Results support clinical applicability of Cybex 6000 data.