seriosuly underrated comment. I finished a 20 min bike ride and feel clear headed. Havent' consumed anything other than black coffee. Most people are so used to eating continuously and never train their bodies to be metabolically flexible. Doesn't help that the "most important meal of the day" shtick was invented by cereal companies trying to sell us crap dessert masquerading as health food.
Counterpoint:
Ive almost never been eating breakfasts and when I went on delivery diet and started eating them then ive been feeling better tbh
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Same routine here. I can ride on that until lunch and I learned this during my (few) years in Italy, because it's normal there.
Also there was a brief moment in my adult life when I had sleep for supper and it was the first time in years when I heard my stomach actually rumbling - I was so used to eating at the first sign of cravings that I forgot how it feels.