Effects of a short-term aquatic exercise intervention on symptoms and exercise capacity in individuals with CFS/ME, 2018, Broadbent et al

I think directly after the training the heart rate will be a bit higher than before, depending on the volume. Your pulse in rest should fall to around 50 if you are well-trained. Professionals can have a rest pulse of 40-45. Another sign of fitness is how fast your pulse will fall, e.g. how much time does it take to get a 190 pulse down to 70-80? During HIT, if your pulse doesn't fall as it used to it means you have come to your limits and should stop, because then going further won't improve performance.

That's what I learned (and observed), it could be different.

 

Another paper has been published on this study. See thread here: https://www.s4me.info/threads/patie...cfs-a-pilot-study-2020-broadbent-et-al.14737/