Achilles Tendinopathy

Tendons connect muscle to bone and often connect near a joint. Tendinopathy is an injury to the tendon. It can cause pain and swelling and makes it difficult to move. Tendinopathy may be: The Achilles tendon connects the calf muscle to the heel bone. An achilles tendinopathy is pain in this tendon.

  • Causes

    Tendinopathy is generally caused by overuse of a muscle-tendon unit. Over time, the strain on the tendon causes structural changes within the tendon.


    Overuse of the Achilles tendon can occur with activities such as:

    • Increasing your speed or running long distances too quickly
    • Suddenly adding strenuous hills or stair climbing to your exercise routine
    • Doing too much too soon after taking time away from exercising
    • A sudden or violent contraction of the calf muscles, such as during an all-out sprint
    • Running too much
    • Lack of flexibility of the calf muscles

  • Definition

    Tendons connect muscle to bone and often connect near a joint. Tendinopathy is an injury to the tendon. It can cause pain and swelling and makes it difficult to move. Tendinopathy may be:

    • Tendonitis — inflammation of the tendon
    • Tendinosis — tiny tears in the tendon with no significant inflammation

    The Achilles tendon connects the calf muscle to the heel bone. An achilles tendinopathy is pain in this tendon.

    Achilles Tendonitis
    Achilles Tendonitis
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  • Diagnosis

    You will be asked about your symptoms and exercise habits. A physical exam will be done. A diagnosis will be made based on the exam and history.


    Images of the bones and tendons may be taken. This can be done with:

    • X-rays
    • Ultrasound
    • MRI scan

  • Prevention

    To decrease your chances of getting Achilles tendonitis:

    • Wear appropriate footwear for your sport.
    • Do not use shoes beyond the advised duration. This will depend on:
      • How frequently you exercise
      • The surface on which you exercise
      • The conditions in which you exercise
    • Gradually add hill work, stairs, speed, and distance to your routine.
    • Stretch and strengthen the calf muscles regularly.

  • Risk Factors

    Factors that may increase your risk of getting Achilles tendinopathy include:

    • Improper or badly worn footwear
    • Inflexibility of the calf muscles
    • An improper training program — such as increasing intensity too quickly
    • Increased age — normal wear and tear can make the tendon more likely to become injured

  • Symptoms

    Symptoms of tendinopathy may include:

    • Tenderness — usually just above the heel bone and often more noticeable in the morning
    • Stiffness that gradually eases as the tendon is warmed-up
    • Pain after activity that gradually worsens
    • Pain along the tendon during and/or after running
    • Swelling in the area of the Achilles tendon
    • Pain at the back of the ankle

  • Treatment

    Tendinopathy and the associated pain may take months to resolve. It can be frustrating, but it is important to follow through with the advised treatment.