A tendon is a band of tissue that connects a muscle to a bone. The Achilles tendon runs down the back of the lower leg and connects the calf muscle to the heel bone. Also called the "heel cord," the Achilles tendon facilitates walking by helping to raise the heel off the ground. An Achilles tendon rupture is a complete or partial tear that occurs when the tendon is stretched beyond its capacity. Forceful jumping or pivoting, or sudden accelerations of running, can overstretch the tendon and cause a tear. An injury to the tendon can also result from falling or tripping. Achilles tendon ruptures are most often seen in "weekend warriors", typically, middle-aged people participating in sports in their spare time. Less commonly, illness or medications, such as steroids or certain antibiotics, may weaken the tendon and contribute to ruptures.
Inflammation/strain of the tendon is usually caused by overuse, for example, frequent jumping in volleyball, netball or basketball. It is often also caused by a sudden increase in certain types of training, such as hill sprinting or track running, particularly when running in spikes. Tendinopathy can also be associated with ageing. Our ability to regenerate damaged tissue decreases as we age and the quality of the tendon deteriorates. However, the better news is that sensible training can actually strengthen all our soft tissue (tendons, ligaments and muscle). Tightness in the calf muscles will demand greater flexibility of the tendon, which inevitably results in overuse and injury. Biomechanically, the tightness can reduce the range of dorsiflexion (toe up position) in the ankle, which increases the amount and duration of pronation. This problem is known as overpronation.* This reduces the ability of the foot to become a rigid lever at push off and places more lateral and linear forces through the tendon. This imbalance can translate into altered rotation of the tibia (shin bone) at the knee joint and, in turn, produce compensatory rotation at the hip joint with subsequent injuries to the shin, knee and hip. Pronation is part of the natural movement of the subtalar joint in the foot. It allows ?eversion? (turning the sole outwards), dorsiflexion and abduction (pointing the toes out to the side). Pronation is a normal part of the gait cycle, when walking and running, and it helps to provide shock absorption in the foot. When pronation is excessive, the foot has a tendency to roll inward more than normally acceptable. One sign of overpronation is greater wear on the inside of your running shoes than on the midsole. Lack of stability around the ankle joint can also be a contributory factor, as recurrent ankle sprains appear to be associated with a high incidence of Achilles tendonopathy. Wearing shoes that don?t fit or support the foot properly can be a major contributing cause of Achilles tendon injury.
Patients who suffer an acute rupture of the Achilles tendon often report hearing a ?pop?or ?snap.? Patients usually have severe pain the back of the lower leg near the heel. This may or may not be accompanied by swelling. Additionally, because the function of the Achilles tendon is to enable plantarflexion (bending the foot downward), patients often have difficulty walking or standing up on their toes. With a complete rupture of the tendon, the foot will not move. In cases where the diagnosis is equivocal, your physician may order an MRI of the leg to diagnose a rupture of the Achilles tendon.
A typical history as detailed above together with positive clinical examination usually will clinch the diagnosis. In an acute rupture, one can usually feel the gap in the tendon from the rupture. There may be swelling or bruising around the ankle and foot of the injured leg. With the patient lying on the tummy (prone position) with the knee flexed, the examiner should see the ankle and foot flex downwards (plantarward) when squeezing the calf muscles. If there is no movement in the ankle and foot on squeezing the calf muscle, this implies that the calf muscle is no longer attached to the heel bone due to a complete Achilles tendon rupture.
Non Surgical Treatment
A medical professional will take MRI scans to confirm the diagnosis and indicate the extent of the injury. Sometimes the leg is put in a cast and allowed to heal without surgery. This is generally not the preferred method, particularly for young active people. Surgery is the most common treatment for an achilles tendon rupture.
Surgery could allow for a quicker healing time. The procedure generally involves making an incision in the back of your lower leg and stitching the torn tendon together. Depending on the condition of the tissue, the repair may be reinforced with other tendons. As with any surgery, the main complication is the risk for infection, however, this risk is reduced by using smaller incisions.
To prevent Achilles tendonitis or rupture, the following tips are recommended. Avoid activities that place an enormous stress on the heel (for example, uphill running or excessive jumping). Stop all activity if there is pain at the back of the heel. If pain resumes with one particular exercise, another exercise should be selected. Wear proper shoes. Gradually strengthen calf muscles with sit-ups if prior episodes of Achilles tendonitis have occurred. Always warm up with stretching exercises before any activity. Avoid high-impact sports if prior episodes of Achilles tendon injury.