Injury advice > Lowerleg/Ankle Injuries > Achilles Tendonitis


Achilles Tendonitis

What is Achilles Tendonitis?

Around 11% of running injuries are accountable to achilles tendonitis. The Achilles tendon is the large tendon at the back of the ankle.

The achilles tendon connects the large calf muscles (Gastrocnemius and Soleus) to the heal bone (calcaneus). It is responsible for providing the power in the push off phase of the gait cycle.

Through overuse the achilles tendon can become inflamed although there are a number of contributory factors. The Achilles tendon is slow to heal because it has a poor blood supply.

Achilles tendoinitis can be acute or chronic. Acute achilles tendinotis may happen as a result of overuse or training too much, too soon especially on hard surfaces or up hills.

What are the symptoms of achilles tendonitis (tendinitis)

Acute inflammation symptoms:

  • During exercise the tendon will be painful.
  • Swelling over the Achilles tendon.
  • Redness over the skin.
  • If you press your fingers into it and move your foot you may feel creaking.

If acute achilles tendonitis is not properly treated it can develop into chronic achilles tendinitis. The pains experienced during the acute phase of the injury tend to disappear after a warm up but return when training has stopped. Eventually the injury gets worse and worse until it is impossible to run.

Symptoms for chronic Achilles tendonitis are similar to those of acute tendonitis as well as:

  • Pain (sometimes described as diffuse along the tendon) and stiffness in the Achilles tendon especially in the morning.
  • There may nodules or lumps in the achilles tendon, particularly 2cm above the heel.
  • When walking up hills or stairs there may well be pain in the tendon.

What are the causes of achilles tendonitis?

  • This is an overuse injury. These are normally caused by doing too much too soon in training.
  • Too much running up hills will cause the tendon to fatigue and this will predispose it to this tendinitis.
  • Overpronation or feet which roll in can place an increased strain on the achilles tendon. As the foot rolls in (flattens) the lower leg rotates inwards also which twists the achilles tendon causing stress.
  • Wearing high heels shortens the tendon, if you then place demands on the tendon, such as running 5 miles in flat shoes, you will put abnormal strain on the tendon making it stretch further than it is comfortable.

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Please see the Virtual Sports Injury Clinic for more information on how to treat Achilles Tendonitis