1.   This is because the body uses carbohydrate calories in a different way from fat calories.

2.   And they say that it looks like the change they elicited made it slightly more difficult for flies to use the calories in their food.

3.   Because weight loss ultimately relies on using more calories than you consume, and because protein sources are high in calories, weight loss requires consuming smaller amounts.

4.   A. By most calculations, you will use more calories running than walking, but there are many variables to be accounted for.

5.   Fats in breast milk are more digestible than those in formula, and breast milk calories are used more efficiently.

6.   Regular aerobic exercise and any activities that increase muscle mass not only use extra calories during exercise, but can also raise the resting metabolic rate.

7.   The net result is a body that uses more calories even at rest, making it easier to lose weight and to maintain that loss with moderate caloric restriction.

8.   This is not the first time ethnic or racial differences have been found in the way people use calories.