So about 4 years ago I became unwell (stomach infection picked up on diving holiday) - I was 34 and a healthy, exercise loving guy. My first year of CFS I spent 11-12 hours sleeping a night, would barely make it through a working week (had to take a month off at one point) and was just exhausted continuously. From there I've slowly (painfully slowly) improved - to the point where 6 months ago I tried for the first time in 3 years to go for short run. It was only 3 miles (I say only as pre-cfs I was running marathons) and I walked a good portion of it - but the key difference was that at the end I didn't feel exhausted - but actually re-energised. I've since started running once a week - with improving fitness. I'd really love to hear from anyone else who has found themselves at a point where exercise actually revitalises - and where they've gone from there? (is this potentially an indication of a path to recovery?) As a classic symptom of cfs is post-exertional malaise does this mean that technically I no longer have cfs? I certainly feel like I have cfs - my cognitive difficulties continue and some weeks my energy is very low- definitely don't think as clearly as I used to.