There were also a couple of studies on catastrophizing by the research team of Jo Nijs. They have a background in pain research so that is probably why they had an interest in the concept.
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But because catastrophizing was (in one of the two studies) related to the duration of climbing, the authors interpreted this as follows:
"Before a physical activity, patients seem to assess how fatigued they will become and adjust the way they perform the activity accordingly."
So even when a patients with ME/CFS are pacing, as they should, they are blamed for catatastrophizing and kinesiophobia.
To me that is just healthy thinking and acting by the patients.