Keto-adaptation is the process of shifting your metabolism from relying mostly on glucose for fuel to relying mostly on fat-based sources of fuel. Not only does that enhance fat oxidation, it also allows your body to start producing enough ketones that they can be used as a significant source of fuel.
This can be an important learning for any endurance athlete, and is one that I’ve used with great success. I’ve been keto-adapted for some months now, and am able to run long distances (30K and up) in a fasted state, fueling only with water, and with no energy depletion, no bonking, and no post-run hunger. It will be my fueling strategy for the Elk/Beaver 50 trail ultra that I’ll run on May 10.
In this video, Dr. Jeff Volek, associate professor at the University of Connecticut and co-author (with Dr. Steven Phinney) of The Art and Science of Low Carbohydrate Performance, offers one of the most comprehensive explanation of keto-adaptability I’ve come across. Highly recommended!