Considering that the vast majority of clinical trials in LC, and in ME/CFS, have been on exercise rehabilitation or forms thereof, this was a very bizarre thing to focus on. It is remarkable in that it's necessary to misrepresent the issue to make it appear "spooky". I'm surprised we haven't been accused of corrupting the youth by playing rock music backwards in order to get them to do the reefer, or whatever.
The idea of HIIT is particularly absurd in either illness, it frankly boggles the mind that anyone would think this is a good idea, but nevertheless it has happened. Hundreds of exercise trials have been performed, what the hell is the value of doing a single more? The idea that a single letter would be enough to derail a trial is genuinely funny, and shows complete ignorance of the entire history of this illness. This ideology is completely dominant, the people doing trials like this don't give a fig about us or what we think. There is typically more than one published each week, going back for years, and no one ever admits even a single mistake, everything they do is always perfect and irreproachable.
Specifically on HIIT:
Fatigue Exacerbation by Interval or Continuous Exercise in Chronic Fatigue Syndrome (2016) Sandler, C; Llloyd, A; Barry, B
Functional Limitations and Exercise Intolerance in Patients With Post-COVID Condition A Randomized Crossover Clinical Trial, 2024, Tryfonos et al
Effect of Combined Rehabilitation on Post Covid 19 CHRONIC FATIGUE SYNDROME, 2024, Abdul Latif
(Recruiting) Exercise Intolerance in Post-COVID Patients, 2022, Lundberg et al
To be fair, I don't think anyone's tested hot-scotching either. That's good for a solid dozen trials, which would only take 10-15 years. Let's wait for this to deliver. Then let's try, I don't know break-dancing. Yeah, whatever why not? Good for at least a decade by mixing and matching all sorts of dancing styles. We could do one strictly about following the routine Raygunn, maybe it's doing the kangaroo that is the magic trick. Then maybe another decade on yo-yoing, followed probably by finger-dancing, that ought to interest a lot of folks in Ireland (maybe I mixed my traditions here).