What type of training did you do prior to falling ill?
Though I've referred to myself as an "athlete" before, I was actually an amateur competitive cyclist before I fell ill. My workload was typically 10-15 hours a week, including races (usually one or two a week in racing the season).
I had sudden onset over three years ago after contracting a URT, which I never recovered from. The day I fell ill a new bicycle frame I'd ordered arrived. I was intending to build it into my new race bike for the coming season, but it sat in its box for two years until I had to accept that I might never ride it and it was best to sell it before it got too out of date. I made a loss of £700 when I came to sell it even though it was still brand new.
All my other cycling stuff has been moth-balled, including about five sets of wheels, four frames, and countless other components, tools and clothing, about half of it still brand new.
When the BPS school start talking about deconditioning and "fear avoidance" being factors in our illness, I have to question whether any of them have ever had any experience of what it is to be an athlete and have the first idea to what extent sick athletes DON'T fear "exercise", but on the contrary feel utterly bereft that they cannot do the one thing they most want to do. It's like telling a mother who has had her child forcibly taken off her and doesn't know when she'll be allowed to see it again that her anguish is due to her not wanting to see her child.
When lies of this magnitude become entrenched and therefore hard to combat, they can make the afflicted feel very angry indeed.