I haven’t done extended fasts but EVERYTHING feels harder those days. Appetite is higher, body more sensitive. In contrast, the week or two after my period is a breeze.
So I try to do my best on those pre-period days and do a bit more on the days in the following weeks. Why swim against the current, you know? Why not do 18/6 for a couple of days and then jump back up?
it’s the opposite for me bc i lose all appetite 2-3 days before period and the first day of period, but i struggle around time of ovulation. point is, yeah, hormones seem to be a huge factor, unfortunately