Initially, the body's glycogen stores are used up in about 24 hours.
Muscle cells, however, lack glucose 6-phosphatase, so they cannot share their glycogen stores with the rest of the body.
As the caloric intake increases along with carbohydrate consumption, glycogen stores become replenished and thus the water weight.
The body's glycogen stores are consumed in about 24 hours.
Normally this sort of training would be relatively impossible on a pure ketogenic diet, as glycogen stores in the body are almost constantly depleted.
This will naturally lead to fewer carbohydrates and lowered glycogen stores.
Another is to restrict what you eat so that glycogen stores are always somewhat depleted and the body must turn to fat to meet its needs.
They must eat enough to keep their glycogen stores at the optimum level, but not gain weight.
If not released, the glucose can be used to build up the liver's glycogen stores if they are empty.
For this reason, when glycogen stores are depleted during exercise, glucose levels fall and fatigue sets in.