[nmarinov]

To add on to what bombcar said: I don't think the implication is CICO doesn't apply.

In my experience (and also studies) change in calorie intake is correlated with change in activity i.e.: when you eat more you naturally move more. Not just exercising and walking but also jittering and cleaning that little bit harder and moving that little bit faster. Or the opposite, saving a little bit of energy.

Instead of moving your whole head to look at something - just a glance and so on.

CICO is still valid but the body adjusts beyond what we can _easily_ measure. It's a lot more complicated but the above is one simple example how it adjusts.

[bombcar]

Exactly. You have to combine a caloric drop with an intentional increase in activity and even then it can take awhile for the changes to start to add up to be noticeable.