6 ms·

You don't "Switch" burning modes when you run out of glycogen stores. Your blood sugar drops because you can't process fat into sugar fast enough. You are alw

You don't "Switch" burning modes when you run out of glycogen stores. Your blood sugar drops because you can't process fat into sugar fast enough. You are always burning fat, and when you are running you are burning it pretty much as fast as you can. Thats why cyclists and long distance runners have to eat while they train longer than 1.5hrs to supplement their fat burning because the glycogen stores are out.

gaius 18y ago
But you are not always burning fat, that's the problem. If the body needs energy like right now and it doesn't have glycogen on hand and cortisol levels are elevated, then it will cannibalize muscle. This is the point I was trying to make earlier. Powerade is strictly for amateurs; serious cyclists (et al) are drinking Perpetuum or Spiz, both of which contain BCAAs and other proteins to offset gluconeogenesis.