The Achilles tendon, also known as the calcaneal tendon is situated at the back of the ankle. It is a hard band of fibrous tissue that attaches the calf muscles to the calcaneus (heel bone of the ankle). The Achilles tendon is also the largest and strongest in the body.
The two calf muscles; the gastrocnemius and soleus form into one band of tissue, which becomes the Achilles tendon at the lowest point of the calf. A bursa (small sac of fluid) covers the Achilles tendon to help support and protect the area.
When we flex the calf muscles the Achilles tendon pulls onto the heel. This enables us to perform day to day movements such as walking, running and standing on our tip toes. So, it is important to be safe when exercising ensuring the area is protected. The tendon has a limited amount of blood supply, so when we place the tendon under strain or tension it can be more susceptible to injury.