A nterior cruciate ligament (ACL) rehabilitation programs have improved dramatically over the last decade. Whereas it once required 10 months to return patient5 to functional status (4,5,15), they can now begin an active lifestyle after only 24 weeks of rehabilitation (3,7).In light of the shortened rehabilitative process, the need to accurately and effectively assess lower extremity function in ACLreconstructed and -rehabilitated patients cannot be overstated. Yet advancements in these procedures have occurred at a far less aggressive pace. Currently, two forms of direct objective analysis exist: isokinetic dynamometry and dynamic functional testing.Isokinetic dynamometry has become a standard tool for lower extremity evaluation (10) because of its control over range of motion, accommodating resistance, movement velocity (21), and reliability (1,11,16,19, 23).Its validity and clinical relevance, on the other hand, have recently been questioned ( 1 1 ). Several studies, for instance, have reported discrepancies in torque output simply
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