@Mominatrix
Thanks for responding.
To your first point on aerobic vs anaerobic exercise
It is correct that no exercise is purely anaerobic. However, some exercises will see the anaerobic pathway dominate. Weight training. Martial arts. Boxing. As examples.
Either way, both ways use glycogen as fuel.
This is only partially correct. Whilst the anaerobic pathway to ATP can ONLY use glycogen (glucose) the aerobic pathway is dual fuel: glycogen or fat. This latter option - fat - is how endurance athletes are increasingly fuelling themselves.
Then you talk about sneaking glycogen back into muscles on a HCLF diet and mention that gluconeogenesis is one of the ways to do this without carbs. May I ask how is would be physiologically possible to create glucose from fat?
Partially correct. LCHF not HCLF. I did say it was slow. This doesn't work for me because I train too often.
To your last point I believe Glycerol from fat breakdown turns to pyruvate which turns to glucose.
The way I deal with the need for explosive power and not bonking:
- creatine so that I can benefit from the creatine phosphate pathway to ATP
- carb load with dextrose or waxy maize post workout ONLY
- strict LCHF at all other times to stay lean at 17% body fat
Well, there is a biochemical way but it cannot manufacture adequate glucose under normal physiology. I don’t know under normal physiological conditions the glycerol backbone of fat can slot into the Krebs cycle - perhaps you do?
I believe I have dealt with this.
Ketosis has been shown to be a glycogen sparer and is of interest to ultraathletes as a way to spare muscle glycogen and shift into using fat as an energy source to prevent “hitting the wall”, but a recent study was not very promising but who knows what further studies will demonstrate. For those ultra athletes, they follow a LCHF diet then do a carbo load prior to competition in order to try and fill glycogen stores.
Agree this may not work for everyone.
Your last sentence is incorrect IMO. If you're fuelling off of fat you don't need to carb load before an aerobic workout. No need for glycogen.
Ultra athletes who follow this paradigm do not eat anything pre workout as far as I can tell.
I'd go so far as to say you shouldn't carb load before an anaerobic workout either. Post workout is when muscles can accept glycogen more readily based on all I've read.