Calories still play a role even when doing IF. The problem with Calories in Calories Out (CICO) occurs when it doesn’t take into account the effect of insulin in the body. What fasting does is drops your insulin levels which allows your body to consume all the glucose in your liver, and then start breaking down fat stores for food. If you overeat what your body needs while doing IF, you just increase the glucose in the liver and fat sources, and if you consume too much, the body isn’t able to have time to burn through it all.
If you have stopped loosing weight (and provided you still have surplus fat stores in your body) it is because your body isn’t able to burn the excess calories that you have eaten stored as glucose or fat during the fasting window. But the great thing about fasting is that you can manipulate what you do to reduce the energy stores in your body or increase the amount of time your body burns the energy stores for food.
As for solutions, the best thing to do is to try something that will work for you and see how it goes. Some options to reduce energy stores and increase the amount of time your body is using stored fat for fuel:
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Calorie counting can be helpful to make us more aware of what we eat, but studies have shown how difficult it is to correctly count calories. So I personally dont think it is necessary.
Calories absolutely matter here, the whole concept really is that you’re not snacking at all hours and more likely to pay attention to what you eat (as with any weight loss method), putting you in a deficit with less effort than a traditional diet, but you can still end up eating more than you burn.
Technically, OMAD/ IF is how I gained weight to start with lol (even tho I didnt know what it was at the time), Ive only ate one meal a day for nearly 5 years now…problem is that “meal” was everything the takeaway choice of that day could possibly offer until I couldnt move from how full I was, probably 4000+ cals a day, so I absolutely WISH the calories didn’t matter or id still be skinny haha
figure out what your average intake is, and as the other reply stated, either lower your eating timeframe so you unintentionally eat less, or actively see where you can cut calories on your current timeframe. I dont know what your caloric needs are, but lowering by 300-500 should help you start burning fat again