I attended the graded exercise programme in Barts 22 months ago. 
I was "sold" the programme under an amazing high degree 
of pressure and selling. 
I could not do the increase of 30% of my activity, realistically though it was 
supposed to be 10%. The physio refused to believe that I could not do it! She 
told me I must be able to do it after I had tried and failed. 
My entire immune system seemed to break down and since those few weeks I am now 
on high doses of anti viral medication from my GP and will be for years. 
I would never do get/gat again or recommend anyone to do so. Try the pacing, but please refuse to do the Enforced targets. I was an innocent fool.
M