Do you burn carbs or just calories?

Okay this is probably a stupid question but oh well... my friend is trying to lose weight fast within a month. Now she has joined a gym and been working out three to five times a week. She wants to be on a low carb diet and so the question is do you only burn calories when you're working out or everything also. For example A cup of milk Calories 90 Carbs 12 Protein 8 <---- that is just an example! When you work out do you burn all of what you drank calories, carbs, and protein or just the calories. We're new to this healthy/exercise stuff lol. Please no rude responses. Thank you :)

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Recommended Answer:

I see what you're asking, and you're not understanding it. In your example, 90 is the count of calories -- which is the total amount of heat that could be released by that food. That is totally separate from the listed grams of carbs, protein, or fat. Each GRAM of macronutrient (carbs, protein, or fat) has a certain number of calories, and the calories listed on the label is the sum of all that. You burn calories, you do not burn grams. Grams are a measure of weight. The calorie is a measure of energy. Talk of "burning calories" is just an imprecise shorthand ways of speaking. What your body does is, it takes the grams of macronutrients, and chemically breaks them down in various ways. That chemical reaction releases heat energy, which enables muscles to contract, warms up your body, etc. We measure heat energy released, in the unit of calories. When we say a food item has 90 calories, we mean that once the body processes that food in its various chemical reactions for energy, up to 90 calories of heat energy can be released.

Other Answers:

• You burn calories. Your body uses the nutrients for various tasks (protein=building muscle, carbs for energy, fat for hormones etc.).
• Your realizing that your diet is complex, not simple calories. You require lots of protein, some fat, but carbs are not required for good health. Then there are "good carbs" and "bad carbs", this is why a low fat diet is healthy but a no-fat diet is not. Why many vegetarians don't get enough protien.