New answers tagged endurance
If you're talking about entering ketosis via a ketogenic diet that's pretty interesting that you felt problems lasting for weeks. Most research I've seen, and my own experience, shows ketones consumption happening ~48 hours after carbohydrate restriction. I'm sure there's a huge variety in there, but 7 weeks seems excessively long. In this 2004 study that ...
Fat burning zones are foolish. Sprinters never train in the fat burning zone and are ripped. Higher intensity exercise can raise your metabolism long after you are done training. The shortest answer is, eating carbs when training stops burning fats, as eating carbs generally stops burning fat.
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