MCL


Posted on August 20, 2025
MCL Injury

Everyone has heard about the dreaded ACL injury. It’s often the culprit of the season’s heartbreak story and the commentator’s favourite injury to diagnose. But what about the MCL? These injuries are just as common and often even coincide with ACL injuries. Here’s everything you need to know about MCL injuries and how we can help you on your recovery journey.

 

What is the MCL?

The medial collateral ligament (MCL) is one of the four major ligaments in the knee that provide stability and support. It runs along the inner side of the knee, connecting the femur (thigh bone) to the tibia (shin bone). Its primary function is to resist forces that would cause the knee to buckle inward- essentially, it is a key player in providing stability to the knee.

 

Common Causes of MCL Injuries

MCL injuries can happen in many ways, but here are the most common scenarios:

  • Sports-related trauma: Athletes involved in high-contact or high-intensity sports like football, rugby, soccer, or basketball are especially vulnerable.
  • Twisting motions: Sudden directional changes or rotational movements can put stress on the MCL, especially when the foot is planted while the body rotates.
  • Direct impact: A hit to the outside of the knee, such as from a tackle or collision, can stretch or tear the MCL.

 

 

How Do You Know If You’ve Injured Your MCL?

Symptoms of an MCL injury can vary depending on the severity of the damage, but common signs include:

  • Pain on the inner side of the knee: You may feel tenderness or discomfort along the length of the ligament.
  • Swelling: Swelling may develop soon after the injury, especially if the ligament has been torn.
  • Instability: The knee may feel “wobbly” or unstable, especially during movement or weight-bearing activities.
  • Difficulty moving the knee: Bending or straightening the knee can become painful or limited.

If you suspect an MCL injury, it’s important to see a professional. A thorough evaluation will determine whether the ligament is sprained, partially torn, or completely torn. It is likely that imaging (MRI being the gold standard) will also be utilised to provide an accurate diagnosis.

 

What Are the Different Grades of MCL Injuries?

MCL injuries are classified into three grades based on the severity of the damage:

Grade 1 (Mild Sprain): This is a mild injury where the ligament is stretched but not torn. You may experience slight pain and swelling, but can typically bear weight.

Grade 2 (Moderate Sprain): The ligament is partially torn, and there may be moderate pain, swelling, and some instability in the knee.

Grade 3 (Severe Sprain): A complete tear of the ligament, causing significant pain, swelling, and knee instability. However, it is important to note that pain may also be minimal if the ligament is completely torn. In severe cases, surgery may be required to ensure the knee doesn’t become chronically unstable.

 

How Physiotherapy Helps in Recovery

Physiotherapy plays a vital role in not only healing the ligament but also getting you back to your full potential as soon as possible. Here’s how:

  1. Pain Management

Physiotherapists use a variety of techniques to help reduce pain and swelling, such as ice therapy, compression, and elevation. Manual therapy (massage and joint mobilisations) can also help alleviate discomfort and promote healing.

  1. Restoring Range of Motion

One of the most important goals in treating an MCL injury is restoring full knee function. Physiotherapy can help improve flexibility and range of motion through targeted exercises that gently stretch and strengthen the knee, preventing stiffness and loss of movement.

  1. Strengthening and Stability

After an MCL injury, the surrounding muscles (like the quadriceps, hamstrings, and calves) may weaken. Physiotherapy includes strengthening exercises to rebuild muscle strength, which is crucial for providing knee stability. The stronger the muscles around your knee, the less stress your MCL will face.

  1. Balance and Proprioception Training

After an MCL injury, you may feel a loss of balance and coordination. Your physiotherapist will work on exercises that improve proprioception (your body’s awareness of its position in space) to help you regain confidence in movement and prevent future injuries.

  1. Gradual Return to Activity

A critical part of physiotherapy is the progressive return to activity. Your physiotherapist will design a program tailored to your level of injury, helping you ease back into sports or physical activities with safe progressions. This reduces the risk of re-injury or overexertion.

Preventing MCL Injuries

Although you can’t completely eliminate the risk of injury, there are several things you can do to reduce the likelihood of an MCL injury:

  • Warm-up properly: A good warm-up before exercise or sport helps prepare your muscles and joints for the activity ahead.
  • Strengthen your legs: Regular strengthening exercises for your quadriceps, hamstrings, and calves can help protect your knee.
  • Improve flexibility: Regular stretching can enhance the flexibility of your knee and hip muscles, reducing the risk of strains.

 

MCL injuries can vary in severity, but with the right treatment plan, recovery is very achievable. Physiotherapy is a crucial part of the healing process, whether you’re dealing with a mild sprain or a more severe tear. If you’re struggling with knee pain or suspect an MCL injury, don’t wait—reach out to us today. Together, we’ll create a personalised treatment plan that gets you back on your feet and feeling stronger than before.