Great insight from everyone! I once had it on one forearm. I took four months off, and it recovered. I started training again, and then it affected the other forearm! Ugh! I took four more months off training. I used to train around tennis elbow in the gym in order to get in my workouts. I sought physical therapy, however, after it hurt me to squeeze my bottle of contact lens solution. That, and it hurt me to rub one out. That was the final straw.
I've been without tennis elbow the past two years after incorporating extra forearm training in my workouts during pull days. I work out flexors, extensors, radial deviation, ulnar deviation, pronation, and supination. Forearm prehab work is a pain in the ass, but it keeps the tennis elbow away from me.