Training at an intensity where zero grams of fat are burned, despite high calorie expenditure, indicates the individual is working too hard and not optimizing fuel partitioning.

“That's a very technical description of what you did. I think it's important for people who are listening to this to appreciate that nuance. You were not there calorie counting saying, okay, I'm doing six hours a day at this many calories because you can achieve that in many different ways. It was almost the maniacal specificity with which you approached this that you basically said you didn't think of it as I'm exercising six hours a week. It's I'm doing mitochondrial conditioning or reprogramming six hours a week. Exactly. Yeah, I believe so. And that's what we know now with patients when we study in the laboratory that they always tell you, I always train at this intensity. And you know that intensity, they burn zero grams of fat. They burn a lot of calories, but zero are derived from fat. Yeah, they're actually working too hard. Too hard.”