Meredith Wood, Health Minute - Who has the faster metabolism? The bigger person or the thinner person? If you guessed the thinner person you would be wrong!

In fact the bigger your body, the more calories you're burning. That's because your metabolism has to work more in order to keep the body functioning and provide basic energy.

That is referred to as your basal, or resting metabolic rate.

Have you ever tried to lose weight and the first ten or so pounds come off much faster than the rest? That's because as you lose mass, your metabolism doesn't work as hard as it did ten pounds ago.

Several other things come into play, like your body composition.

Lean mass, which includes muscle, burns more calories than fat. So the more muscle you have, the more calories you're burning. 

And we can't forget physical activity. Everything from walking to sprinting takes energy, helping us torch those calories.