Is the position of that window relevant?

So, I sleep 9h, which means, I'm awake 15h.

If I don't eat 2,5h before and after sleeping, would this be enough?

> If I don't eat 2,5h before and after sleeping, would this be enough?

Some researchers think so, yes. I don't think anyone knows what is optimal. Research is ongoing.

> Is the position of that window relevant?

Who knows!

This seems like one of the things that makes it hard to test intermittent fasting: there are a bunch of variables other than just the length of the window.

so lunch AND dinner or just early dinner? always feel like these hourly windows are underspecified since you can cram a ton of food in that time

If it's a 10 hour window presumably most people are eating multiple meals, but it's not really underspecified since you can eat whenever you want during that time.

There are other people doing 4 hour windows for IF in which case it's more like a single meal, but that's not what this study tested.

(This is just explaining the idea, not advocating IF)