Popliteus is a one-joint muscle that provides stability to the knee. It is prone to compensating for two-joint synergist muscles upon their failure to properly execute movement.
In ACL repairs, the lateral popliteal tendon is often cut or damaged, causing the popliteus to concentrically contract (shorten). This is one of the many reasons why post-surgical ACL knees are difficult to fully extend months after surgery.
Have you had knee surgery? Could popliteus be a factor in your pain/lack of full knee extension?
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