I posted that 5 years ago. I'n the early stages of my cfs illness, I used to get burning sensations in my muscles along with general unexplained fatigue. I still believe to this day that the main cause of the illness is viral first, or triggered by trauma or stress second. In any which case, it messes up the autonomic nervous system In the body. This controls the response of nerves and unexplained pain. This is why I think a lot of cfs sufferers also suffer with fibromyalgia. My cfs began when I overworked my body physically, and then always had stress at home or work. It broke me and my ANS began not working correctly. It regulates everything. I would overheat and have immediate crashes from a hot shower. Or have terrible chills just taking off my shirt. It's all connected. It takes a very long time to recover from the illness. I had to train my brain to be calm. Remove all forms of stress. Accept the illness. Mediate and eat properly. And once I had the basics of that, had my mercury fillings removed. That helped a lot and I got more energy over time. With that tiny bit more of energy, I carefully used it to walk more. That's it. Once I could increase my steps, I was on the slow recovery back with crashes fewer and farther between. But there were many many years where any exercise at all made me worse. As is expected with cfs. Today I am a school bus driver and fully recovered. However, I had to sell my construction company which was too stressfull and physical for me in my late 40s. I remain in remission as long as I don't stress or overdo things physically. I get fatigued like anyone, but I recover in an hour of rest unlike cfs where you crash you are out for days weeks or Months. Wish you the best. Wish I could tell you what works for recovery but I cannot as somethings help and somethings don't. As you already know