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Evaluation of Knee Stability Before and After Participation in a Functional Sports Agility Program During Rehabilitation After Anterior Cruciate Ligament Reconstruction

K. Donald Shelbourne, MD and Thorp J. Davis, MD

Methodist Sports Medicine Center, Indianapolis, Indiana

Presented at the 23rd annual meeting of the AOSSM, Sun Valley, Idaho, June 1997. Winner of the 3M Award.

Address correspondence and reprint requests to K. Donald Shelbourne, MD, 1815 N. Capitol Avenue, Suite 530, Indianapolis, IN 46202

We sought to determine whether participation in a functional sports agility program as early as 4 weeks after anterior cruciate ligament reconstruction with autogenous patellar tendon graft would affect objective knee stability in 603 patients. The rehabilitation program prescribed a functional sports agility program at a mean of 5.1 ± 1.0 weeks postoperatively when full knee hyperextension, knee flexion to 120°, and quadriceps muscle strength of 60% of the normal leg had been achieved. The patients had KT-1000 arthrometer testing before beginning the program and at subsequent follow-up after they had performed the sport activity. The mean manual maximum KT-1000 arthrometer difference was 1.9 ± 1.3 mm at initial testing and 1.9 ± 1.2 mm at follow-up testing. The frequency distribution of the KT-1000 arthrometer scores revealed that 92.7% of patients at initial testing and 93.2% of patients at follow-up testing had displacement difference of 3 mm or less. The results of this study show that functional sports agility programs during the early rehabilitation period after anterior cruciate ligament reconstruction with a correctly placed autogenous patellar tendon graft do not cause a change in graft stability.

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