[Mariner]

His theory has been discredited by current research.

High performance (efforts above 75% of VO2 max) require carbs after no more than 30mins.

If one stays below that level fat is adequate.

Not a lot of people exercise at or above 75% of max, but some of us do.

And there not a lot of things that feel worse than a hard bonk.

[BobL]

“His theory has been discredited by current research. High performance (efforts above 75% of VO2 max) require carbs after no more than 30mins.”

I think that he found the same, hitting a wall as he called it, where the brain is being protected. But like you say, 75% is top-notch.

But I generally target my posts to the other 99.9998% of the country.