glycogen
n. uncountable C1 Advanced US //ˈɡɫaɪkədʒɪn// UK //ɡlˈaɪkədʒən// glyco·gen
n. a type of sugar that your body stores for energy. It is mostly found in your liver and muscles and is used when you need a quick burst of power.
n. a branched polysaccharide of glucose that serves as a form of energy storage in animals and fungi. It is primarily stored in the liver and skeletal muscle cells.
Your body converts glucose into glycogen for later use.
After a long run, your muscle glycogen stores are depleted, so you need to eat carbohydrates to replenish them.
The liver acts as a primary reservoir for glycogen, releasing glucose into the bloodstream during periods of fasting to maintain stable blood sugar levels.
Borrowed from French glycogène.