There's one main difference between tennis and golfer's elbow, and that is its location. While tennis elbow involves damage to the OUTSIDE of the joint, golfer's elbow is an injury to the INNER side. Both commonly occur in the sports they are named after, but really they can happen to ANYONE. BOTH injuries are caused by repeated movement of the forearm and wrist. Over time, the pulling on the muscles and tendons connected to the elbow joint creates small tears. The damage makes your elbow puffy, STIFF, and painful. Sometimes the pain may extend down your forearm and into the wrist. You may also notice that your arm feels WEAK and that you may have trouble grasping things. For example, like when trying to turn a doorknob. Tennis elbow, involves the muscles that EXTEND your wrist and fingers. GOLFER's elbow involves the muscles that FLEX your wrist and fingers. The difference comes from the way that tennis and golf players grip their racket or their clubs. Any activity that incorporates these muscles can put you at risk-especially when repeated over and over. A simple way to make sure you don't get a case of either is to fix your form. Poor form can overload the muscles in your forearm. To prevent tears, try gentle stretching before any activity. To find out the best ways to treat your elbow pain, check out the rest of the videos in this series.