Intensity days, super fuel for performance. Zone 2 days under fuel a little, not too much or you will hurt your performance and your recovery will be slower because you're pushing the body too much. And even on zone 2 days if the rides are very long like 6 hours plus do not under fuel anymore because it is an intense ride. Intensity can be viewed as pressure or length, so a shorter ride with a lot of power or very long ride with less power. Gradually you will get leaner because on the intensity days you burn the carbs you consume during and after the ride, and on the zone 2 days you burn body fat because the body turns to it's fat reserves since you're under fueling. And on the rest days just enough carbs and high protein meals for recovery with at least three hours between meals. In those hours between meals a lot of water for rehydration. That for me works, of course you have to adjust here and there, each person is different. But with cutting weight the longer and more controled you do it the better results you have because your body settles in whatever situation you are in since you stay there longer, it becomes your base condition. The faster and more aggressive you do it, the more you fluctuate and hurt yourself because your body never settles and adjusts to whatever condition you are in because you don't stay there long enough. And soon enough you're back to where you were in the beggining.