my 37 year old daughter is experiencing severe muscle weakness, and pain. It started in her legs and then her arms. She has trouble lifting her arms . She recently had a muscle biopsy and we just learned that the biopsy did not show anything, as the Radiologist put it, it may have been a bad biopsy?? My daughter is being treated for polyomyositis, and was prescribed Prednisone steroids, she has been taking the steroids for a period of three weeks but there does not seem to be much improvement. Just a thought: she took a heated 113 degree yoga class a couple of months back, would that somehow exhaust her musceles? My daughter lives in Colorado. Do you have any recommendations? Thank you.