Regarding the "true difficulty" I don't think you can generalize like that. For example I suspect it depends on where you live, what hours fasting is, temperatu

Regarding the "true difficulty" I don't think you can generalize like that. For example I suspect it depends on where you live, what hours fasting is, temperature and so on. My friends here have told me that the main problem is to eat enough during the night because after fasting for 18 hours your body get used to it. I assume similar to my issues eating a bkg breakfast in the morning directly after waking up.