The term “Fat Adapted” has never gelled with me. It is like saying we are “oxygen-adapted.” With enough training could we become water adapted like fish?

Must we “teach” our bodies over a period of weeks to properly burn fat? Once we are out of glucose, shouldn’t we burn fat without the need for proper training? Is it possible that being fat adapted is more of a psychological state rather than a physiological state?

If someone deeply understands the physiological mechanics behind the theory of keto-adaption, I would love to better understand it. Are we saying that if I have zero glucose reserves that I will burn fat better if I am fat adapted compared to having zero glucose reserves without the proper physiological “fat burning cellular education”?