Achilles Tendonitis


The Achilles tendon is the largest tendon in the human body and can withstand forces of 1,000 pounds or more. But it is also the most frequently ruptured tendon, and both professional and weekend athletes can suffer from Achilles tendinitis, a common overuse injury and inflammation of the tendon. Any number of events may trigger an attack of Achilles tendinitis, including:

  • rapidly increasing your running mileage or speed
  • adding hill running or stair climbing to your training routine
  • starting up too quickly after a layoff
  • trauma caused by sudden and/or hard contraction of the calf muscles when putting out extra effort such as in a final sprint
  • overuse resulting from the natural lack of flexibility in the calf muscles


Symptoms of Achilles tendonitis fall into a common pattern. Because several conditions such as a partial tendon tear and heel bursitis have similar symptoms, you need to see your orthopaedic surgeon for a proper diagnosis.

  • Mild pain after exercise or running that gradually worsens
  • A noticeable sense of sluggishness in your leg
  • Episodes of diffuse or localized pain, sometimes severe, along the tendon during or a few hours after running
  • Morning tenderness about an inch and a half above the point where the Achilles tendon is attached to the heel bone
  • Stiffness that generally diminishes as the tendon warms up with use
  • Some swelling or pain in the back of the heel where the tendon attaches to the bone.


Most cases of Achilles tendonitis can be successfully treated without surgery. Treatment depends on the degree of injury to the tendon, but usually involves

  • Rest, which may mean a total withdrawal from running or exercise for a week, or simply switching to another exercise, such as swimming, that does not stress the Achilles tendon
  • Nonsteroidal anti-inflammatory medication
  • Orthoses, which are devices to help support the muscle and relieve stress on the tendon such as a heel pad or shoe insert
  • A bandage or brace specifically designed to restrict motion of the tendon
  • Stretching, massage, ultrasound and appropriate exercises to strengthen the weak muscle group in front of the leg and the upward foot flexors

Surgery is often an option of last resort. If friction between the tendon and its covering sheath makes the sheath thick and fibrous, surgery to remove the fibrous tissue and repair any tears may be the best treatment option. Recovery is slow, may require a temporary cast and includes a rehabilitation program to avoid weakness.


Reduce the odds that you’ll develop Achilles tendonitis by doing the following:

  • Walk and stretch to warm up gradually before running. It's better to spend few minutes warming up than to spend months on the sidelines with a ruptured Achilles tendon. Focus on stretching and strengthening the muscles in the calf.
  • Increase your running distance and your speed gradually, in increments no greater than 10% a week.
  • Avoid unaccustomed strenuous sprinting, hill running and the like.
  • Cool down properly after exercise.
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