I think all about what one is used to. I used to eat large breafast and would feel horrible by lunch if I skipped it. But after skipping the breakfast most days for a couple months I’m barely hungry before lunch and haven’t noticed any difference in energy levels.
Is it just me or are 9-5 hours naturally the most stifling?
for me at least, 8 hours any other time of the day is less bad than the constant awful grind of 9-5...