With the exception of Ben Greenfield, none of these people seem to have a sports science background. In the realm of athletics, things like intermittent fasting

With the exception of Ben Greenfield, none of these people seem to have a sports science background. In the realm of athletics, things like intermittent fasting and keto diets are something of a meme. Some people do advocate for training with depleted muscle glycogen first thing in the morning, but there's no consensus that this does anything.