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Everything you need for an easy workout in the great outdoors. Shop the best fitness gear featured on NBC News Now.
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If you've plunged into the world of nutrition, chances are, you've encountered the word 'calorie' more than often. But what exactly is it and why does it matter? Well, hold on to your hats folks; we're about to dive headfirst into this important topic.
Picture a calorie as the energy currency used by our bodies. Imagine putting fuel in your car – that's essentially what calories do for us. They provide essential fuel that powers every function from breathing to brain activity!
Now let me ask you something: did you perceive all calories as being created equal? Most answer with an affirmative nod at this point - but not so fast! Calories come from three primary sources: fats, carbohydrates and proteins (and alcohol). Each has its unique impact on our body; hence different caloric values influence metabolic rates differently. Isn't that fascinating?
You might have heard about this "2K-cal diet" protocol recommended by health departments across the globe while asking yourself: "How accurate could they be when everyone's body types differ so massively?" Actually my friend, it’s mostly just an average figure based on rudimentary mathematics done back in 1930s. Individual needs still vary depending upon age, sex, weight and level of physical activity among other things.