[haxel]

I also ride bike, and used to bonk, but it didn't take long for my body to adapt to using fat as fuel. Half the battle was mental: accepting that I truly didn't need to eat anything; my body already had all the fuel it needed.

Then I could wake up, ride hard for hours (hilly terrain), and feel no need to eat until the afternoon.

[matwood]

Agreed that it's mostly mental. Missing a meal isn't starvation, and the body/mind adapt.

I do IF and do most of my physical activity before my first meal every day. It was hard at first, but now it's when I have the most energy and clarity.