I am 77 and tapering slowly since my diagnosis lat May (4 mg now). I do believe that an intense bout snow shoeing in Jan 2023 caused my body to overreact, hence PMR reared its ugly head. Prednisone has been a miracle drug, but I am hoping to be done with it soon. With that said, exercise has been a lifesaver. At first I was only walking 3-4 miles 5x per week (a shoulder surgery prevented other exercises). Now I can finally use the gym so I am doing resistance training 2x per week. I have also been doing yoga 2x per week since September. All this is to say that my exercising has not caused any flare ups. Do my muscles feel sore? Yes, but it’s not the same kind of debilitating soreness that I experienced with PMR. So I would concur the the above comments and start exercising slowly and know that you body will thank you. Keep the faith. Liz Ward