What question did this study set out to answer?

To assess the performance symmetry of knee extensors and flexors six months post ACL reconstruction with a rectus femoris tendon autograft.

Significant Deficits Are Seen in Extensor Muscle Performance but Not Flexor Muscle Performance 6 Months After Anterior Cruciate Ligament Reconstruction Using a Rectus Femoris Tendon Autograft

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To assess the performance symmetry of knee extensors and flexors six months post ACL reconstruction with a rectus femoris tendon autograft.
Retrospective case series with 31 male patients, mean age 26.3 years.
Isokinetic tests measured performance at 60°/s for both extension and flexion.
Paired t-tests compared the performance of operated and nonoperated limbs.
Operated limb achieved 71% peak torque of the contralateral limb (P < .001 for extension).
Flexor performance was nearly complete, with 93% peak torque of the contralateral limb (P = .355).
Significant deficits identified in knee extensor performance but not in knee flexors.

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Retrospective case series evaluates knee extensor and flexor recovery after ACL reconstruction, suggesting distinct recovery patterns.

Barros et al. (2026) studied this question.

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