I’m 69 no health problems, I workout with dumbbells and run 1.5 miles when I workout. When this started I was trying new dumbbells exercises for my legs. The next day I had muscle stiffness and pain, just thought it was from these new exercises. Well it never went away. My family doc gave me a prednisone pack felt fine within days but the pain came back. Currently I had blood work and mri and awaiting to see a Rheumatology doc. Went from 221 to 207 in a month. Loss muscle mass in arms, shoulders and legs. My sister in law is going through the same with Pmr. We both had Covid shots Pfizer make no boosters . My suspicion falls upon the shot.