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If I understand this correctly, the experiment is suggesting to have a gap of 10hr window between any two meals ?

No, all your eating happens in that 10 hour window. You fast for at least 14 hours per day. Easy enough if you eat an early dinner and don't snack after.

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?

> 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.

> 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.

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)

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