I noticed this when I was working odoing heavy cario regularly but now read an article that mentioned it. Exercise increases insulin sensitivity. I noticed that when I would spend a few hours a day doing some decently intense cardio, rather than actually being feeling hungry or anything, I would come back and when I would rehydrate, I would actually feel full.  I would read stories here where fats "reward" themselves for working out, or are always hungry afterwards, and I wondered what the fuck was wrong with them (not really, I knew they were fat fucks and that's their problem but I wondered how they could be). But, it did kind of make sense, and in that regard, fucking even diabetes makes sense. They're starving their bodies because they arent actually using their bodies or the energy they ingest.  It's like car ownership. If you dont start the engine and run it often enough, it will damage the car.