I've had tennis elbow in both elbows at the same time. I had to make a lot of lifting adjusts. I would wear wrist braces to help stabilize wrist to decrease strain on forearms. I never quit lifting, though some exercises I couldn't do. It took over 6 months for my forearms to heal. I used take a foam roller against the wall, make a fist and roll my wrist inward to stretch forearm and then roll the piss out of them. Tennis elbow happens from over use of the muscles causing scar tissue to build and then the muscle loses elasticity, becomes weaker and the tendon tries to help pick up the load, causing micro tears in the tendon. So the goal is to break up the scar tissue by intense massaging. Some chiropractors specialize in active release technique(art), where they stretch the muscle and do a deep tissue message, supposed to be very effective and hurt like hell, typically leaving bruises.
I would not do cortisone shots, I also would not take ibuprofen. I have read that NSAIDs can actually prolong healing time.
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You should also continue to work the muscle doing wrist curls. Depending on how bad the tendonitis is, (I could barely pick up a full glass of water) starting with something like a can of soup and doing a couple sets of 15 or so reps until there is a little discomfort and stop. Once you can achieve that without discomfort, you up the weight and do it again, and again.
Remember, it is supposed to take tendons 6-12 months to heal.
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