<p>Deborah,</p>
<p>That’s kind of a hot topic because there is an emerging hypothesis that endurance athletes can bonk-proof themselves by adapting to an ultra-low carb ketogenic diet and becoming extremely efficient at fueling their training with fat. Since I’m never been on a ketogenic diet or an endurance athlete, I have no idea. I’m not sure that it’s relevant to most of us, either way, since most of us probably can’t stick to a ketogenic diet or eat like a Kenyan marathoner.
I think it’s a very slippery slope to look to marathoner nutrition for real-world eating tips. Endurance athletes are the one group who can most likely consume mass quantities of carbohydrates without getting fat, but god help them if they ever stop running.</p>
<p>Anyway, if you want to dig into it, the first place is Dr. Jeff Volek at UConn. He’s probably the world’s leading expert on low carb nutrition and athletic performance. His group has done quite a bit of research. He’s even written a new book on the topic. I haven’t read it yet…</p>
<p>[Amazon.com:</a> The Art and Science of Low Carbohydrate Performance (9780983490715): Jeff S. Volek, Stephen D. Phinney: Books](<a href=“http://www.amazon.com/Art-Science-Low-Carbohydrate-Performance/dp/0983490716/ref=la_B001JOYRQE_1_3?ie=UTF8&qid=1361320977&sr=1-3]Amazon.com:”>http://www.amazon.com/Art-Science-Low-Carbohydrate-Performance/dp/0983490716/ref=la_B001JOYRQE_1_3?ie=UTF8&qid=1361320977&sr=1-3)</p>
<p>Here’s a talk he gave on the topic:</p>
<p>[Low-Carb</a> Experts: Jeff Volek, MD, R.D., PhD - Segment One (9:23) - YouTube](<a href=“Low-Carb Experts: Jeff Volek, MD, R.D., PhD - Segment One (9:23) - YouTube”>Low-Carb Experts: Jeff Volek, MD, R.D., PhD - Segment One (9:23) - YouTube)</p>
<p>Volek believes that it is possible to even perform better on a low carb diet.</p>
<p>A second guy who is writing some stuff on this topic is Peter Attilia. He’s and MD and triathalete (endurance swimmng specialist). He got interested after getting fat while doing stuff like swimming from Los Angeles to Catalina Island and back. Now, he lives and does Ironman training on an ultra low carb ketogenic diet. Most of what he writes is over my head:</p>
<p>[The</a> interplay of exercise and ketosis ? Part I The Eating Academy | Peter Attia, M.D. The Eating Academy | Peter Attia, M.D.](<a href=“http://eatingacademy.com/nutrition/the-interplay-of-exercise-and-ketosis-part-i]The”>The interplay of exercise and ketosis – Part I - Peter Attia)
[The</a> interplay of exercise and ketosis ? Part II The Eating Academy | Peter Attia, M.D. The Eating Academy | Peter Attia, M.D.](<a href=“http://eatingacademy.com/nutrition/the-interplay-of-exercise-and-ketosis-part-ii]The”>The interplay of exercise and ketosis – Part II - Peter Attia)</p>
<p>The flaw I noticed immediately in the article you linked is that the time frames were too short. One thing Volek has consistently found is that athletes need as much as a month of adaptation to a low carb diet. If you measure their performance after a week or two, it will be way off. If you measure it after a month, it’ll be back up.</p>