Looked again at NICE recommendations on GET 1.6.2.16, and can see why it is so controversial! Says (a) establish baseline activity level that does not exacerbate symptoms and increase from that level (b) sustain that level for a week and then increase by up to 20% weekly. I would suggest from own empirical observations that both of these recommendations are more appropriate for rehabilitating other conditions, but not CFS. This recommendation needs to be integrated with “Envelope Theory” mentioned in section 1.4.6.3 for a more suitable regime. About half the baseline and one third the increment more appropriate, in my opinion. Discusses as if relevant only to fatigue, not mentioning pain, only half the story.    