As physiotherapists, we see MCL injuries walk through our doors more often than almost any other knee complaint. In this article, we’ll walk you through exactly how MCL injuries happen, the symptoms that signal it’s time to get checked, what recovery timelines typically look like, why early physio intervention matters, and the key stages of rehab you can expect — plus we’ll answer the questions we get asked most in clinic.

The MCL (Medial Collateral Ligament) is a thick band of tissue on the inner side of your knee, connecting your thigh bone (femur) to your shin bone (tibia).

Function of the MCL:

• Stabilise the knee joint during walking, running, and especially when changing direction
• Stop the knee from caving inward 

How can the MCL be injured?

MCL injuries often happen when there is force that pushes the knee inward, causing the MCL to stretch & tear.

Common causes include:

• Sports injuries (football, soccer, skiing)
• Sudden change of direction or twisting
• Direct blow to the outside of the knee
• Slipping or awkward landing

Symptoms of an MCL injury:

• Pain on the inside of the knee
• Pain when rolling in bed
• Pain when straightening knee
• Swelling and tenderness
• Feeling of instability & giving way
• Difficulty walking or bending the knee

How long does an MCL take to recover?

MCL injuries are graded based on severity:

• Grade 1 (Mild) 2-4 weeks: Small stretch, minimal instability
• Grade 2 (Moderate) 4-6 weeks: Partial tear, noticeable ligament laxity
• Grade 3 (Severe) 6-12 weeks: Full tear, significant instability

👉 The good news: most MCL injuries heal well without surgery

Physiotherapy: The Key to Recovery

Physiotherapy is the first-line treatment to rehabilitate an MCL injury.

Why see a Physiotherapist for your injury?:

Your physiotherapist will utilise hands-on treatment & implement appropriate exercises to facilitate your recovery.

• Eliminate pain and swelling
• Restore knee range of motion
• Rebuild lower limb & core strength
• Improve knee stability and balance
• Safely return to sport or activity

Rehab progression

Early Stage:

• Range-of-motion exercises
• Activation exercises to maintain muscle function

Mid Stage:

• Higher level strength training to regain muscle bulk
• Balance and control exercises

Late Stage:

• Sport-specific drills
• Agility and return-to-running program

Click to next page to read further on most frequently-asked questions.