It is estimated that Achilles tendonitis accounts for around 11% of all running injuries. The Achilles tendon is the large tendon at the back of the ankle.
It connects the two muscles gastrocnemius and soleus to the heel bone. The Achilles tendon can become inflamed for a number of reasons, the main reason being overuse.
The Achilles tendon has a poor blood supply and, therefore, it is slow to heal.Find out more