MCL injuries are among the most common knee injuries in sport, and the good news is most of them heal well without surgery. Here’s what an MCL injury actually is, how it’s graded, and what recovery really looks like.
What the MCL does
The medial collateral ligament runs along the inside of your knee and stops it from buckling inward. It’s most often injured by a direct hit to the outside of the knee, common in hockey and football, or by a sudden awkward twist while planting your foot, common in skiing and soccer.
How MCL injuries are graded
Grade 1 is a mild stretch or sprain: some pain, minimal instability, usually healing within a couple of weeks with rest and rehab. Grade 2 is a partial tear: more pain and swelling, noticeable looseness, typically needing a hinged brace and a longer rehab window. Grade 3 is a complete tear: significant instability, and while it can still often be managed without surgery, it needs closer monitoring and a more structured recovery plan, especially if other ligaments are also involved.
What treatment looks like
Most MCL injuries respond well to conservative treatment: rest in the early days to calm swelling, a hinged brace for grade 2 and 3 sprains to protect the ligament while it heals, and progressive rehab to rebuild strength and control. Unlike an ACL tear, surgery is uncommon for an isolated MCL injury.
When it’s more than just the MCL
MCL injuries sometimes happen alongside other knee injuries, most notably the ACL, especially with higher-force mechanisms. Part of a proper assessment is ruling out (or confirming) whether other structures are involved, since that changes the treatment plan significantly.
Getting assessed in Calgary
If your knee took a hit or twisted awkwardly and now feels sore or unstable on the inside, an assessment can tell you what grade of injury you’re dealing with and what recovery will actually take. At Action Sports Clinic, we assess the knee, grade the injury, and build a treatment plan around your sport and timeline.
Dealing with an MCL injury? Learn more about our sports physiotherapy, read about MCL bracing options, or request an assessment.