Hi, I am wondering if any of you had poor stamina before you got CFS. Mine was a more gradual onset rather than acute viral - although symptoms got worse after coming down with a flu. I've actually had poor stamina starting in my teenage years. I tired more easily than my peers but still pushed myself to be active. I actually remembering having signs of dysbiosis back in middle school, along with a sort of "out of it" feeling gradually worsening into brain fog and lowered concentration. I had also had poor balance, anxiety, fatigue, and it seems like everything got worse when I got CFS. I feel like I definately have a predisposition for this illness. This makes me gravitate towards Myhill's mitochondria hypothesis and Rich's GD-MCB hypothesis.