Think you need mountains of carbs to be a good ultra-runner? Think again...

We’ve often heard within the context of endurance athletics that you must be consuming copious amounts of carbohydrates in your diet in order to adequately fuel your performance. But what would happen if an athlete decided to shift his training from being a sugar-burner to a fat-burner using ketones for fuel instead? That’s what marathon runner Timothy Allen Oson from the “Sole To Soul Rhythm” blog decided to put to the test after experiencing stomach pain during his races.
— 642: Ultramarathon Runner Timothy Olson Thrives On A Low-Carb Diet | The Livin La Vida Low-Carb Show

Skip forward to the 8:45 mark to hear the interview with Timothy.