Golfer's aren't the only athletes subject to pain on the inside bump of the elbow, the medial epicondyle. Any activity that puts repeated strain on the forearm tendons attaching to the medial epicondyle can produce similar symptoms. The medical term for golfer's elbow is medial epicondylitis.
Swimmers are particularly at risk for this problem. Repeating swim strokes over and over can begin to put a strain on the flexor tendons of the forearm. And swimmers who power their arms through the water to gain speed can end up straining the tendon where it attaches on the medial epicondyle. Eventually, these strains can begin producing symptoms of medial epicondylitis.