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Michael A. Tabor, George J. Davies, Thomas W. Kernozek, Rodney J. Negrete and Vincent Hudson


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


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


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


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


27 subjects from UW-L and 30 from UCF.

Main Outcome Measures:

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


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


The LEFT is a reliable assessment tool.