A Multicenter Study of the Test–Retest Reliability of the Lower Extremity Functional Test

in Journal of Sport Rehabilitation
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Context:

Many clinicians use functional-performance tests to determine an athlete’s readiness to resume activity; however, research demonstrating reliability of these tests is limited.

Objective:

To introduce the Lower Extremity Functional Test (LEFT) and establish it as a reliable assessment tool.

Design:

Week 1: Subjects participated in a training session. Week 2: Initial maximal-effort time measurements were recorded. Week 3: Retest time measurements were recorded.

Setting:

The University of Wisconsin–La Crosse (UW-L) and the University of Central Florida (UCF).

Subjects:

27 subjects from UW-L and 30 from UCF.

Main Outcome Measures:

Time measurements were analyzed using intraclass correlation coefficients (ICCs).

Results:

ICC values of .95 and .97 were established at UW-L and UCF, respectively.

Conclusions:

The LEFT is a reliable assessment tool.

Tabor is with the Froedtert and Medical College Sports Medicine Center, Milwaukee, WI 53226-3596. Davies is with the Dept of Physical Therapy, University of Wisconsin–La Crosse, La Crosse, WI 54601, and Gundersen-Lutheran Sports Medicine Center, Onalaska, Wisc. Kernozek is with the Dept of Physical Therapy, University of Wisconsin–La Crosse. Negrete is with Florida Hospital, Orlando, FL 32810. Hudson is with the Athletic Training Program, University of Central Florida, Orlando, FL 32810.