A Cross-sectional Examination of Quadriceps Strength, Biomechanical Function, and Functional Performance From 9 to 24 Months After Anterior Cruciate Ligament Reconstruction.

The American Journal of Sports Medicine
Michael T CurranRiann Palmieri-Smith

Abstract

Patients who undergo anterior cruciate ligament reconstruction (ACLR) have deficiencies in strength, functional performance, and biomechanical function at return to activity. Patients who have abnormal strength and function after ACLR may be at a greater risk for secondary injury and posttraumatic osteoarthritis. To examine quadriceps strength, functional performance, and knee biomechanics in patients who are 9, 12, 18, and 24 months after ACLR. Cross-sectional study; Level of evidence, 3. We recruited 82 participants (45 female) who underwent ACLR and were cleared to return to activity . Participants were assigned to 1 of 4 groups based on their time from ACLR: 9 months (285.26 ± 8.16 days), 12 months (373.59 ± 8.81 days), 18 months (557.50 ± 11.96 days), and 24 months postoperative (741.05 ± 11.86 days). Quadriceps strength was measured concentrically at 60 deg/s. Functional performance was assessed by measuring maximal hop distances or heights during dynamic hopping/jumping tests (single-leg hop, triple hop, crossover hop, and single-leg vertical hop). Biomechanical function was evaluated during the dynamic hop tests by using peak sagittal plane knee flexion angles recorded during landings. Strength, performance, and biomech...Continue Reading

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Mar 20, 2021·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Alexander T PeeblesRobin M Queen

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