I'm interested to know more about people's bad experiences too. Is, or was your exercise intense, moderate, mild? What was your routine? Did you experience PEM, or manage to avoid it?
My story is that I had been having issues with fatigue for many years, along with a range of other CFS related symptoms, but for the purpose of staying on topic I won't go into that.
As per the normal advice for anyone looking to improve their energy levels, I took up lifestyle changes like eating better, and taking up more exercise. I swam once or twice a week for many years, experiencing PEM semi-regularly, usually after intense swimming sessions, or other particularly stressful events. I later took up running perhaps once or twice a week.
Over the years, I noticed that my fitness progression was slower than some of my friends who did similar levels of exercise, however through perseverance and even harder work I managed to progress past them. I won't lie, I'm a competitive person. I was improving over time. I was the healthiest, leanest, and fittest I have ever been.
I stepped up my training schedule earlier this year, and because I was exercising more frequently, I would more often exercise while in the midst of PEM. I didn't know at the time that how detrimental that was going to be, I took the no pain, no gain approach to fitness.
Eventually I started to encounter new CFS symptoms which I had not previously suffered from, and that lead me to obtaining a diagnosis for ME/CFS.
After a crash unlike anything I've experienced, I'm now out of the woods it seems. It's been an exercise in itself to stop myself from exercising. I think some of you will relate to being very driven when it comes to fitness. However I don't think I would be where I am now, had I not spent many hours resting, bored stiff, even when I felt well enough not to be.
I hope that exercise can be a positive thing, when done cautiously. In the short time I've been feeling comparatively well again, the times which I have exercised and managed to keep below my threshold have been followed by deep, restful sleep, and subsequent days of elevated mood and sense of well being. Unfortunately as I mentioned in my original post, the opposite has also recently occurred where I have crossed my own boundaries.
I hope more people will share their stories in more detail