Quadruple-Digit Post Count
Glycogen and Ketones1) Does the body deplete muscle glycogen first, before it switches to using ketones?
The percentage of muscle glycogen and ketones used is dependent on various factors; primarily diet and your training protocol.
The Ketogenic Diet
The Ketogenic Diet depletes glycogen in approximately 3 days and the body shift over to using ketones for energy.
Fasting increase the fat burning hormones (nor-ephedrine, ephedrine, glucagon, cortisol, etc). Research shows fat burning as well as you metabolism initially increase.
Muscle Glycogen Restoration2) A keto-adapted person will have glycogen restored first via ketones?
Research shows that muscle glycogen level are restored to approximately the same as those on a Traditional Western Diet, once Keto Adapted. There a time element to it.
Muscle Glycogen Restoration occurs via gluconeogenesis. Protein and Glycerol from Triglycerides are converted to glucose and stored in the muscles.