Glucose and glycogen, how activity intensity and type of exercise affects them?

Glucose is supplied by dietary carbohydrate or you can get it also from the partition of glycogen from the liver. Glycogen is much more limited than fat. How long a person's glycogen will last while exercising?

If you do an intense exercise like running, you will use glycogen quickly. Less intense exercise such as walking, you will use it slowly. Though, eventually, you can run out of it, this depletion can occur about two hours of vigorous exercise.

DURING AEROBIC EXERCISE

During moderate exercise, the lungs and circulatory system can give enough oxygen to the muscles, which extract their "gasoline" for working from both dextose and fatty acids. This way, you metabolize a lot of fat, which also yields alot of "gasoline" and you keep your glycogen stores.

DURING ANAEROBIC EXERCISE

Intense exercise presents another movie. Heart and lungs will work more to provide oxygen and when the muscle demands more and more, being the oxygen supply not enough, fat cannot be used. Instead, muscles must begin to rely more heavily on dextrose.

In anaerobic metabolism you cannot yield as much "gasoline" as in aerobic type, but muscles have a reserve of glycogen to use.

Glucose, how we store it, use it and return it to the body

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