A few weeks ago I tweeted about a fasting low carb diet:
Today I talked to guy who hammers through 6hr workouts after 24hr fasts & figured out how 2 do it without bonking. Want me 2 interview him?
– Ben Greenfield (@bengreenfield) August 9, 2012
I received multiple responses of “Yes!”.
The guy I mentioned in that tweet was Peter Attia, who has been on my show before in the episode “Is It Possible To Be Extremely Active and Eat A Low Carbohydrate Diet?”.
As promised, I got him on to talk about how to turn yourself into a fat burning machine by fasting for 24 hours and then going out and doing a monster workout (without bonking), and in today's interview with Peter, I ask him:
-Do you stay in ketogenesis all the time?
-When you do something like fast for 24 hours, then go on a long bike ride, what exactly are you trying to achieve?
-What do you actually take on or before a long ketogenic training session? Any calories at all, or just some kind of supplements?
-What do you think is the ideal protocol for someone during a workout in which they want to maintain as high an intensity as possible, but also burn fatty acids as a primary fuel?
-Do you think there could be potential side effects of this approach, such as a decreased metabolic rate, lower thyroid, immune system deficits, or anything like that?
A few resources Peter and I discuss in this interview are (and by the way, sorry about my ice crunching habit, my mic sensitivity was turned up way higher than I thought!):
-Abbott Diabetes Care ketone monitor – This is the device Peter uses for checking his glucose and beta-hydroxybutyrate (B-OHB) levels (those are his ketones).
-UCAN SuperStarch – a corn based starch fueling product with very low release of insulin and extremely stable blood sugar compared to other gels, sports drinks, powders or bars.
Questions, comments or feedback about combining fasted workouts with low carbohydrate diets? Leave your thoughts below.