From Katherine Langford, Moorland, Somerset, UK
I feel a significant flaw in research on the use of exercise for post-viral conditions such as long covid is that many people aren’t well enough to participate. I have moderate ME and yet wouldn’t be able to take part in an exercise programme like the one in the article. Unfortunately, this can lead to a self-selecting sample of those who are moderately to mildly affected by such an illness. Findings can’t be generalised to those who are severely ill (17 February, p 14).
