Originally Posted by
burnthesheep
Another mistake lots of joes make is the assumption of how much fat adapted they are and at what power output that fat/carb contribution actually does bias towards the fat. In other words, they're likely burning more carb than fat at a lot lower power level than they're assuming.
This. Lots of posts here seem to assume that folks are perfectly fat adapted as if it's an all or nothing "metabolic switch".