PMR is not considered a muscle wasting disease but age and lack of use can be. I am 72 and always worked out with weights , worked construction, and very active. A year of PMR and Covid lockdowns dropped me considerably. I cant get my old level back. Sometimes I just hope I can make it to 79. I am back to lifting weights and outdoor projects but no where near the same level. Each day can bring a pain somewhere. Seems to work itself out. I am PMR pain free. No steroids. Take cholesterol medication.(not statins). If it helps, I saw on the evening news an elderly man fell in his yard trimming bushes. He couldnt get up. Kept calling for help and someone finally heard him. So all the neighbors pitched in to help clean his yard. They said the elderly man was 71. I thought geez. I can still get off the ground. Might take a little longer. So that is what we have to look forward to.