1. The data showing impaired sprint performance came out about 8 years after I wrote UD2. I’m good, I can’t predict the future.

2. “On average, performance didn’t generally improve which led to the conclusion that the approach was still invalid. However, in the studies that showed individual data, a pattern emerged that I found interesting. The subjects who got the best performance on carb-based diets showed the biggest decrease on the fat adaptation diet. But subjects who did relatively poorer on high-carbs usually got a performance boost on the with fat adaptation.”

Certainly not all perform well on low-carbs even with adaptation. Some continue to perform poorly. And I even addressed this within this article.

And it also depend on what we are talking about. What performance, what activity, what kind of training?

That is, Nugg, what type of event are you talking about?

As well, 2 day carb-load is the key to what you wrote.

Lyle

I hate to say it, but maybe the athletes perfomed like $hit cause they “felt” miserable on low carbs.

I’ve seen over and over again, once one has become fat adapted, that carbs have little impact on exercise performance. Lyle has stated himself that he has witnessed the phenominon of people working at amazingly high levels at low carbs.

I have yet to see dimished performance on 5 days of low carbs during a training cyclye, or mid season, followed by two days of higher carbs and ( pre, peri, post workout carbs around said sporting event)

Show me.

Others include what appear to be clear genetic adaptations which are beneficial for running, growing up at altitude, a massive culture of running, incredible competition between Kenyan runners (which selects out the superior ones) and probably even more than that.

They also just train an absurd amounts, I’ve read reports of 3 a day training/6 days per week. A typical schedule is apparently a short morning run (fasted), a second run about 4 hours later (which ties in with research on gene experession) that is often higher quality and then a third run in the evening. They are keeping gene expression for endurance going around the clock.

Basically, they combine the right genetics with the right environment with a drive to succeed. That’s how you get champions.

My only point in bringing them up had to do with habitual diet and whether there is any merit to the idea of cyclical keto diets and endurance adaptations.

Second comment- Kenyans. Some endurance coaches explain their pre-eminence as a result of their willingness to train endlessly at *very* moderate levels thus restricting the training challenge to aerobic capabilites while, by contrast, most other athletes push too hard and end up either overtrained or training in a no-mans land as far as specificity goes. In short, the claim is that the Kenyans have about a billion times more base training than the rest of the field. Have no idea if there’s any merit to that explanation.

IMTG’s depleted by 2 hours treadmill running can be repleted within 24 hours.

One study found repletion was no faster in trained vs. untrained subjects.

Would enriching the diet in a particular fat favor repletion of IMTG stores after endurance exercise?