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Tennis Elbow (Lateral Epicondylitis)
Tennis Elbow (Lateral Epicondylitis)
Tennis elbow, or lateral epicondylitis, is a painful condition of the elbow caused by overuse. Not surprisingly, playing tennis or other racquet sports can cause this condition. However, several other sports and activities besides sports can also put you at risk.
Tennis elbow is inflammation or, in some cases, microtearing of the tendons that join the forearm muscles on the outside of the elbow. The forearm muscles and tendons become damaged from overuse — repeating the same motions again and again. This leads to pain and tenderness on the outside of the elbow.
Anatomy
There are many treatment options for tennis elbow. In most cases, treatment involves a team approach. Primary doctors, physical therapists and, in some cases, surgeons work together to provide the most effective care. Your elbow joint is a joint made up of three bones: the upper arm bone (humerus) and the two bones in the forearm (radius and ulna). There are bony bumps at the bottom of the humerus called epicondyles, where several muscles of the forearm begin their course. The bony bump on the outside (lateral side) of the elbow is called the lateral epicondyle.
Muscles, ligaments, and tendons hold the elbow joint together.
Lateral epicondylitis, or tennis elbow, involves the muscles and tendons of your forearm that are responsible for the extension of your wrist and fingers. Your forearm muscles extend your wrist and fingers. Your forearm tendons — often called extensors — attach the muscles to bone. The tendon usually involved in tennis elbow is called the extensor carpi radialis brevis (ECRB).
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Cause
Overuse
Recent studies show that tennis elbow is often due to damage to a specific forearm muscle. The ECRB muscle helps stabilize the wrist when the elbow is straight. This occurs during a tennis groundstroke, for example. When the ECRB is weakened from overuse, microscopic tears form in the tendon where it attaches to the lateral epicondyle. This leads to inflammation and pain.
The ECRB may also be at increased risk for damage because of its position. As the elbow bends and straightens, the muscle rubs against bony bumps. This can cause gradual wear and tear of the muscle over time.
Activities
Athletes are not the only people who get tennis elbow. Many people with tennis elbow participate in work or recreational activities that require repetitive and vigorous use of the forearm muscle or repetitive extension of the wrist and hand. Painters, plumbers, and carpenters are particularly prone to developing tennis elbow. Studies have shown that auto workers, cooks, and even butchers get tennis elbow more often than the rest of the population. It is thought that the repetition and weight lifting required in these occupations leads to injury.
Age
Most people who get tennis elbow are between the ages of 30 and 50, although anyone can get tennis elbow if they have the risk factors. In racquet sports like tennis, improper stroke technique and improper equipment may be risk factors.
Unknown
Lateral epicondylitis can occur without any recognized repetitive injury. This occurence is called idiopathic, or of an unknown cause.
Symptoms
The symptoms of tennis elbow develop gradually. In most cases, the pain begins as mild and slowly worsens over weeks and months. There is usually no specific injury associated with the start of symptoms.
Common signs and symptoms of tennis elbow include:
- Pain or burning on the outer part of your elbow
- Weak grip strength
- Sometimes, pain at night
The symptoms are often worsened with forearm activity, such as holding a racquet, turning a wrench, or shaking hands. Your dominant arm is most often affected; however, both arms can be affected.