If you're pretty sure it's your tennis, not your typing, that's hurting your elbow, check out Racquet Research, which offers detailed discussion of how racquet weight, balance, and flexibility factor into arm injuries. A few of the author's conclusions are not clearly supported, but those concerning weight are solid, and the site has a lot of useful data.
Unfortunately, a number of sites discussing tennis elbow give bad advice about stroke mechanics and racquet weight. Such advice is best gotten from a certified pro or racquet technician who can clearly explain the physics and biomechanics behind his or her recommendations.
The next question is, of course, how to treat your unhappy elbow.
If you prefer a doctor's care to home remedies, you'll find support for that preference at Southern California Orthopedic Institute. They consider physical therapy to have no value, but they do recommend several preventative measure for the patient to undertake at home. Their main recommendation is use of braces and, if conservative measures fail, surgery.
Interestingly, The American Academy of Orthopaedic Surgeons favors conservative, non-surgical treatment.
"Coping with Tennis Elbow" offers a detailed exercise program to prevent recurrence once symptoms have disappeared.
Two articles, "Physical Therapy Corner: Tennis Elbow" (especially good) and "Keeping Tennis Elbow at Arm's Length: Simple, Effective Strengthening Exercises," provide good illustrations of recommended exercises.
Do you know of any great tennis elbow sites I've left out? If so, please post them in this forum discussion. Countless elbows out there will thank you.

