Quick question for some of you glucose testers!
3rd round of Keto. 1.2 on the ketones while glucose was 80 as of this morning. 14 hours fasted…went and worked out with some XCT before hand. Came home and tested my glucose…was sitting at 100. Where did the glucose come from?? Did that spike come from muscle protein??
Looking forward to the discussion!
Thank you!
Your body still makes glucose and uses it mostly to supply your muscles and brain, though nowhere near as much as before. People not on keto that have high insulin will indeed start burning some muscle so it is important for them to eat and supplement. You on the other hand are burning fat and producing ketones, and a byproduct of that is some glucose. Your liver also stores if I remember right about 300g (edit this is wrong, 300-400 in your muscles, 100-150 in your liver) of glucose so when you work out and start burning through your glucose the liver sends out some reserves to resupply your muscles, and more are made while producing ketones.
A lot of people think all we burn is fat but that’s not true, we still burn a lot of glucose.
Simplified, so anyone feel free to correct me.
Ok, so assuming that I am at least in Nutritional Ketosis…that glucose SHOULD be coming from fat fuel…not necessarily from muscle protein?
Yes, there is no real reason to burn muscle when all the fat is freely available and you have plenty of glucose in your system and being produced. This is one of the reasons people can fast for so long, all the glucose your body needs can come from fat, so as long as you have enough fat you shouldn’t burn muscle.
So riddle me with this then…I’m pretty new to actually understanding the numbers and what is going on. Post workout can kick me out of the Nutritional Ketosis threshold? Before working out I was a 1.2 but finished up a 0.4?
Lot’s of info on this in general and the linked page specifically. It can get pretty sciency but you can see he gets the same sort of numbers with some of his workouts, notably with higher intensity.
You’re not likely to burn muscle, but you could be burning other lean tissue that you don’t need. As you get smaller you have excess skin and other tissue. Your body isn’t stupid, it will burn what you don’t need before it burns muscle. You won’t burn muscle until there absolutely isn’t anything else. You do want the excess skin scavenged.