offers great advice, but it's kind of dated.
The Prince Graphite Classic OS is supposed to be one of the best, and it's been around and been used by pros forever (so we'd know if it created injuries), but it's a racquet for an advanced player. If you're not hitting the "sweet spot" on your racquet every point, that's going to really mess up your elbow (or shoulder or wrist) no matter what racquet you buy, and I'd suggest getting one that makes it really obvious when you hit the sweet spot so you can develop that skill, like the Babolat Pure Drive Cortex. These two racqets have very different "feels" to them, but they and many others can provide some elbow protection, so don't go just by how they feel: Buy one that feels good, and
is also head-light
, not lightweight
, and non-stiff*
Always: talk to a doctor/sports therapist to see what's best for you, and try before you buy.
*Consider also: resting, always using new balls, and perhaps elbow supporters:http://www.sportsinjuryclinic.net/cybertherapist/front/elbow/tennis_elbow_brace.htm