why do you burn less calories if you weigh less?

Answer 1

The same reason a Toyota Corolla burns less gasoline than a Ford truck. A smaller body has less mass, and thus requires less fuel to propel it at the same rate as a more massive body. Another way of looking at it is that It takes more energy to push a wagon loaded with 200 lbs of rocks than it would if the wagon was only loaded with 100 lbs. Calories are energy. So it takes less energy to run a small body than it does a large one.

Answer 2

There is less weight to move around and your mass is allot smaller so basically less strain on your body to live thus burning less calories. Kind of like why a truck with nothing in the bed burns less gas then a truck that has 200 pounds of lumber in the bed.

Answer 3

The number of calories you burn is dependent upon mass x exertion. Smaller mass = less calories burned.

Answer 4

It's a combination of having less mass to move, so you do less work, and you have less muscle mass, so fewer muscle fibers burning calories.

Answer 5

When you weigh more, your body requires more energy to maintain normal body function. Using more energy = burning more calories.

Answer 6

Because you need something to burn...ie:Fat..
Fat is stored energy...The body burns that to create "heat" just like fuel to a fire...

Answer 7

Because your body doesn't have to work as hard. Use this to see how much:
http://www.magnetic-diet.com/calorie-calculator

http://www.magnetic-diet.com/exercise-calorie-calculator

Answer 8

cause you got alot less to burn.

Answer 9

cause you dont have many calories in you if youre really skinny

Answer 10

less fat to burn