Welcome to the Get Fit Guys quick and dirty tips to slim down and shape up.

There is a deep, dark, mysterious exercise secret that personal trainers and fitness pioneers have struggled for decades to hunt down.

Like Bigfoot, the Loch Ness Monster, and the goose that laid the golden egg.

The one who discovers this elusive secret will go down in infamy and live eternally glorified

in exercise manuals everywhere.

Folks, that's how most people understand the fat-burning zone.

But by the time you finish this episode, you'll know the best way to discover your personal fat burning zone easily and exactly how to use it.

So what is the fat burning zone? As you learned in the episode how to tone and lose fat in one body part, your body relies on fat as a primary fuel.

But because the body is a complex machine,

it's able to make energy from other fuel sources too, like protein and carbohydrate. Throughout the

day, each person uses a combination of carbohydrate, fat, and protein fuel sources to create the energy

that's necessary to sit up, climb stairs, filter blood in the kidneys, make the automatic

lung muscles function, help the heart to beat, and even lift a fork to eat. The most efficient

of these energy sources is fat. One pound of stored fat can provide 3,600 calories of energy,

which is far more than most people burn in a single day. In comparison, a pound of storage

protein or carbohydrate provides less than half that much energy. Because fat provides so much energy,

the body relies primarily on fat during rest and during relatively slow and easy physical activity.

From an evolutionary survival standpoint, this makes sense, since most people can only

store about 2,000 calories of carbohydrate on their entire body. So if you burnt carbohydrate as your

primary fuel, you'd have to be finding food and eating all day long. And if you burnt protein as your

primary fuel source, your body would have to break down muscle and other organs to get the protein fuel.

Or you'd have to be rooting around for nuts, seeds, eggs, and meat all day long.

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