That's too bad to hear. I also was an avid lifter pre surgery days but I found out everytime is start going hard I would end up flared and back on prednisone. One work I found and love with all my heart(and hear me out before judging this lol) is DDPYOGA. Yes it is a yoga based work out but you use your own body resistance with a lot of the moves. You sweat like a hog and actually feel good and stretched when you are you done. I managed to lose 28 pounds of prednisone weight in a few months. Bc we all know what prednisone can do! It's just an alternative to look in to. Google DDP yoga watch some of the videos and preferably the one about Arthur. Hope this might help some of you! I'm chomping at the bit to be able to hit the mat again! It was the best I had felt in all my colitis days! And maybe it can help you guys to!