Article: Calorie Burning Is a Personal Thing; The More You Weigh, the More Work You're Doing as You Exercise

If a cookie contains 100 calories, anyone who eats it consumes 100 calories.

But the other side of the energy equation isn't that simple. When it comes to burning off calories, people who do the same activity at the same pace for the same amount of time can burn vastly different numbers of calories, depending on their size. For example, if a family of three jogs side-by-side for 30 minutes, the 175-pound father will burn 400 calories, the 130-pound mother will burn 300 calories and the 65-pound child will burn 180 calories.

"Larger people burn more calories than smaller people, particularly with activities like walking or stair climbing, where they have to carry their own ...

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