My initial viral illness caused severe muscle pain and weakness (predominantly lower extremity proximal muscles). I did not have rhabdomyolysis. Autoimmune testing, EMG, and muscle biopsy all normal. Currently, presumed diagnosis is viral myopathy. My Coxsackie subtype 4 was elevated and my stomach biopsy +3 positive for VP1 enteroviral protein. I use to run, bike, kayak, rip stick and golf before my illness. Now I can barely walk around the block with my dog. Any activity leads to severe burning aching sensation especially at night. I also have random muscle fasciculations all night long.
As with most CFS sufferers, I have PEM, sleep disturbance, and periodic brain fog. Luckily, my autonomic dysfunction got better after 8-10 months.