If not enough carbohydrate is consumed to maintain blood glucose levels for the brain, nervous system, and developing red blood cells
the breakdown of glycogen for glucose results in a loss of water, which many interpret as weight loss.
This hormone inhibits the uptake of glucose by muscle and other cells and promotes
the breakdown of glycogen in the liver in order to release glucose into the blood.
Insulin can also inhibit
the breakdown of glycogen or gluconeogenesis.
Elevated insulin prevents the use of stored fuel by inhibiting the breakdown of fat and
the breakdown of glycogen (stored glucose in the liver).
Peripheral norepinephrine and epinephrine are involved in a variety of physiological processes that help to support exercise such as glycogenolysis or
the breakdown of glycogen to glucose, which the muscles use as a main source of energy supply during exercise.