I stumbled on to this page after
typing in a
search on DanActive. I
marathon runner, and I
have been experiencing the same things for over 8 months. I seem to be in a cycle where I can do a few hard workouts, and then I get "sick" but strangely, I seem to lack any definitive symptoms, like a definite sore throat, or cough. Instead, my body just feels like I have the flu, (extreme fatigue, weakness, inability to do anything except lie on the couch).