Tennis elbow injuries occur though prolonged gripping in racquet sports as well as repetitive movements that eventually lead to aching, throbbing and tenderness on the outer elbow. This condition, known as lateral epicondylitis, caused by the inflammation of the outer forearm and elbow where tendons attach to the bone, is exacerbated by additional strain on the area.
Consult an osteopath for physical therapy and advice on the appropriate exercises for strengthening and stretching the muscles.