Overview Achilles tendon rupture is when the achilles tendon breaks. The achilles is the most commonly injured tendon. Rupture can occur while performing actions requiring explosive acceleration, such as pushing off or jumping. The male to female ratio for Achilles tendon rupture varies between 7:1 and 4:1 across various studies. Causes The most common cause of a ruptured Achilles' tendon is when too much stress is placed through the tendon, particularly when pushing off with the foot. This may happen when playing sports such as football, basketball or tennis where the foot is dorsiflexed or pushed into an upward position during a fall. If the Achilles' tendon is weak, it is prone to rupture. Various factors can cause weakness, including corticosteroid medication and injections, certain diseases caused by hormone imbalance and tendonitis. Old age can also increase the risk of Achilles' tendon rupture. Symptoms Symptoms of an Achilles tendon rupture include sensation that someone or something has hit the back of the calf muscle, sudden pain, pain when walking, weakness in the leg, which is particularly noticeable when trying to push off while walking and there is not sufficient strength to do so. Diagnosis During the physical exam, your doctor will inspect your lower leg for tenderness and swelling. In many cases, doctors can feel a gap in your tendon if a complete rupture has occurred. The doctor may also ask you to kneel on a chair or lie on your stomach with your feet hanging over the end of the exam table. He or she may then squeeze your calf muscle to see if your foot will automatically flex. If it doesn't, you probably have ruptured your Achilles tendon. If there's a question about the extent of your Achilles tendon injury, whether it's completely or only partially ruptured, your doctor may order a magnetic resonance imaging (MRI) scan. This painless procedure uses radio waves and a strong magnetic field to create a computerized image of the tissues of your body. Non Surgical Treatment Once a diagnosis of Achilles tendon rupture has been confirmed, a referral to an orthopaedic specialist for treatment will be recommended. Treatment for an Achilles tendon rupture aims to facilitate the torn ends of the tendon healing back together again. Treatment may be non-surgical (conservative) or surgical. Factors such as the site and extent of the rupture, the time since the rupture occurred and the preferences of the specialist and patient will be considered when deciding which treatment will be undertaken. Some cases of rupture that have not responded well to non-surgical treatment may require surgery at a later stage. The doctor will immobilise the ankle in a cast or a special hinged splint (known as a ?moon boot?) with the foot in a toes-pointed position. The cast or splint will stay in place for 6 - 8 weeks. The cast will be checked and may be changed during this time. Surgical Treatment An Achilles tendon rupture is a complete tear of the fibrous tissue that connects the heel to the calf muscle. This is often caused by a sudden movement that overextends the tendon and usually occurs while running or playing sports such as basketball or racquetball. Achilles tendon rupture can affect anyone, but occurs most often in middle-aged men. Prevention The following can significantly reduce the risk of Achilles tendon rupture. Adequate stretching and warming up prior to exercising. If playing a seasonal sport, undertake preparatory exercises to build strength and endurance before the sporting season commences. Maintain a healthy body weight. This will reduce the load on the tendon and muscles. Use footwear appropriate for the sport or exercise being undertaken. Exercise within fitness limits and follow a sensible exercise programme. Increase exercise gradually and avoid unfamiliar strenuous exercise. Gradual ?warm down? after exercising.