Great article here

Hat tip to my man Curb for point this one out to me .

Notice the graphs in the article with the athletes.

I predicted this response when I was talking to Bob Seebohar about 3 years ago now—that you can be so reliant on glucose that you will NOT see a crossover point. This is shown by athlete 1 (although I am not sure how they ran the test), but notice that it came back!

If you don’t have a crossover point, you are not metabolically flexible, period. That is NOT healthy, normal, or good for performance. How this is “lost” on almost all the endurance world is beyond me. Brooks and Mercer showed the crossover theory officially in 1992, but it has been shown well before that.

People then go too far into keto diets and crash and burn when they need power during a race. Fat adaptation is great, but don’t go so far that you lose the ability to use carbs.

These stupid arguments about which is better, fats or carbs are just plain dumb. You do NOT have to pick only one! Use BOTH! Get the best of both worlds ala Metabolic Flexibility

If you bought a Prius would you want to drive around in gas mode all day if you are trying to get a better mpg? Hell no. The gas supplements the performance of the electric, hence that is why it is a hybrid. Ditto for metabolism—use both fuels, but pick the right fuel for the right task.

Expecting to get a high power output by using only fat will NOT work. Bioenergetics 101. Expecting to ride forever at a moderate power output by only using carbs is riding the razor’s edge since you need to match carb use with carb intake. Use fat for that activity –your body has enough of it!

Ending my tyrant and back to finishing editing my third study…