Tibialis posterior dysfunction is one of the most common overuse injuries found in the foot & ankle.

The tibialis posterior muscle originates high in the shin from the back surfaces of the tibia and fibula. It tracks down along the inside border of the tibia, passes around the inside of the ankle and terminates via two attachments in the foot.  The main insertion (and that of interest to this particular injury) is into the tuberosity of the navicular.

The tibialis posterior is an extremely important stabiliser of the foot & ankle. It functions to produce inversion at the ankle and also plays a major role in maintaining and supporting the medial arch.

Why?

• As an overuse injury through years of wear and tear associated with high impact activities such as running
• Acutely as a result of sudden increase in training volume or intensity OR the use of inappropriate footwear

Athletes with poor foot biomechanics such as flat or pronated feet, tight calves and poor pelvic stability are at more risk of developing tibialis posterior dysfunction.

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