Originally Posted by
Branko D
The problem is that the carb metabolism gets regulated down when you do keto fat adaptation stuff.
So there's no net gain to be had from an bicycle racing point of view - if anything possibly a loss because cyclists spend more time at high percentage of VO2max than an ultra runner will and the ability to go in the red can often be decisive.
Really?
Was that your experience or do you have a reference to back that up? My 5 minute power (VO2 max proxy) was about the same whether keto fat adapted or a sugar burner. It was 3% higher as a fat burner but that is not significant
Cyclists actually spend a higher percentage of their time in Zone 2 sitting in the pack than a runner who has nowhere to hide (draft). If your hypothesis that VO2 max is blunted, then, this would be very harmful when a break is made.