Test–Retest Reliability of Lower Extremity Functional Tests after a Closed Kinetic Chain Isokinetic Testing Bout

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Robert C. Manske
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Barbara Smith
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Frank Wyatt
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Context:

Athletes are often examined for return to sports using a functional-testing algorithm. No research has determined whether a closed kinetic chain (CKC) isokinetic testing bout influences the reliability of functional tests.

Objective:

To determine whether a concentric CKC isokinetic test bout alters test–retest reliability of lower extremity functional testing.

Design:

Subjects participated in velocity-spectrum CKC isokinetic bouts on 2 days 1 week apart.

Setting:

Hospital-based clinic.

Participants:

28 normal subjects (mean age 26.7 years, height 27.2 cm, weight 75.8 kg).

Analysis and Results:

Means and SDs were determined. Intraclass correlation coefficients were used to calculate test–retest reliability and between days 1 and 2 ranged from .91 to .98.

Conclusions:

Even after a CKC isokinetic test bout, test–retest reliability of functional tests is very high. Future research should determine test–retest reliability of functional tests for patients with lower extremity pathology.

Manske and Smith are with the Dept of Physical Therapy, Wichita State University, Wichita, KS 67260-0043. Wyatt is with the Dept of Health, Human Performance, and Recreation, Baylor University, Waco, TX 76798.

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