This is pain occurring to the outside of the elbow on the bony prominence and is caused by excessive loading and stressing to the tendons to the forearm muscles which attach to the elbow. Tennis players can be prone to this condition due to poor technique hitting the ball at the outer edge of the racket leading to reaction forces through the handle of the racket through to the forearm. It can also be caused by excessive gripping of the racket and weakness in the forearm muscles. However, many people who experience tennis elbow, have never lifted a tennis racket. Any repetitive activity which stresses the tendons of the outer forearm muscles can lead to this condition.