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How many calories can the body store in the liver and muscles?
Asked by on Nov 14, 2008
Lets pretend my glycogen stores are empty, or at least almost, and I go and eat 1000 calories worth of fast-acting carbohydrates. How many of those calories will be stored as fat and how many will go to the body’s glycogen stores?
Carbohydrate is stored in the liver and muscles as glycogen for use when energy is needed. Assuming your glycogen stores were depleted, all 1000 carbohydrate calories will become glycogen and none will become fat. The amount of glycogen stored in the liver ranges from 60 – 120 grams (250 – 500 calories) depending on the time of day and the carbohydrate content of the last meal. Muscle holds relatively less glycogen but muscle mass is larger and so 200 – 500 mg (800 – 2000 calories) of glycogen is stored in the muscle a 150 lb man. To dramatically increase muscle glycogen levels, eat a high carbohydrate meal right after a vigorous workout.