[halfcat]

I recall someone, maybe Tim Ferriss, saying it typically takes him 6-8 weeks before he can do an equivalent workout on keto, and for high level endurance athletes much longer, like 12-18 months of adaptation before they start seeing clear benefits over their previous non-keto baseline.

So there’s an adaptation period, which is why it’s hard to do studies on this, because people starting keto cold turkey is likely to result in worse performance, mentally and physically, in the short term.

[iamacyborg]

High level endurance athletes are unlikely to be going full keto given the need for intra-race nutrition.