Tennis elbow—or lateral epicondylitis—isn’t restricted to tennis players, says Matthew T. DesJardins, M.D. While golfers and tennis players can certainly experience such deep pain around the outside of the elbow, this degenerative condition can affect anyone engaged in repetitive motion activities that stress the muscles and tendons of the forearm. “It’s wear and tear caused by overload,” Dr. DesJardins explains. The resulting discomfort is not just bad for your game; it can interfere with simple activities like lifting a coffee cup, turning a doorknob, or shaking hands. And if pain keeps you awake at night, it’s time to see a sports medicine specialist.