Ankle Pronation

 

Ankle pronation and knee injuries 

Ankle pronation and knee injuries are

closely linked because the foot and ankle serve as the foundation for the entire lower body’s alignment. While pronation (the natural inward rolling of the foot) is a necessary movement for absorbing shock, overpronation—where the foot rolls inward excessively—can cause a "chain reaction" of misalignment that puts significant stress on the knee. 

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How Overpronation Affects the Knee

When the arch collapses and the foot rolls too far inward, it triggers a series of biomechanical shifts: 

• Internal Tibial Rotation: As the foot rolls in, the lower leg bone (tibia) is forced to rotate internally.

• Twisting Forces: The upper leg bone (femur) may rotate in a different direction, creating a "twisting" or "wringing" force at the knee joint, which is primarily designed for bending, not rotating.

• "Knock-Knee" Alignment: Excessive inward rolling can lead to a "knock-knee" (valgus) position, causing the kneecap (patella) to track improperly. 

 

Common Knee Injuries Linked to Overpronation

• Patellofemoral Pain Syndrome (Runner’s Knee): Improper tracking of the kneecap against the thigh bone causes pain at the front of the knee.

• Iliotibial (IT) Band Syndrome: The internal rotation of the leg can irritate the IT band where it crosses the outer side of the knee.

• ACL Injuries: Research suggests that hyperpronation may increase the risk of Anterior Cruciate Ligament (ACL) ruptures by pre-loading stress on the knee ligaments.

• Knee Osteoarthritis: Over time, the abnormal distribution of weight and joint stress can contribute to the wear and tear of cartilage, potentially leading to arthritis.

• Meniscus Tears: The twisting forces can place excessive strain on the medial meniscus. 

 

 

Addressing the Connection

Correcting the underlying foot issue is often key to resolving the resulting knee pain: 

• Footwear & Orthotics: Supportive shoes with firm midsoles or custom orthotic inserts can help stabilise the arch and prevent excessive inward rolling.

• Mobility & Strengthening: Exercises to improve ankle dorsiflexion (the ability to pull toes toward the shin) and strengthening the hip and glute muscles can help control the rotation of the leg.

• Gait Analysis: Professional assessments by podiatrists or physiotherapists can pinpoint exactly how your foot strike is affecting your knees.