askchapo

Ah that is a common misconception of an oversimplified model. In general long term compliance is low, it's hard to feel hungry all the time. If people increase calories to a normal level after restricting for loss they typically still feel hungry, and will intuitively eat until they have regained most of the weight they lost.

Feeling hungry for the rest of your life blows hard and compliance isn't there so therefore it doesn't work.

People with bodies that are working well typically don't feel hungry after overeating. I know if I eat cake for breakfast I just wont feel hungry at lunch, whereas some people will continue to feel hungry even if they fill up on "healthy" food. While it's true that some foods are more satiating than others it isn't true that if one eats only highly satiating food and avoids "junk" foods their bodies will self regulate well.

Exercise is not actually very effective for weight loss, it tends to make people hungrier than the calories it burns. If I run 10kms I burn like half a meal's worth of calories but I sure as hell feel like eating a double helping of brunch afterwards. While there are many compelling reasons to avoid a sedentary lifestyle it isn't true that we can finger sedentary lifestyles for fatness.