How many calories must be used to burn a pound of fat?

Tman2002 · Mar 17, 2006

I've been thinking about this ok 1 pound= about 454 grams, and a gram of fat is 9 calories. So 454x9=4086 but I've always been told/taught that you must burn 3500 cals to burn a pound of fat. So what about the extra 586?

PHIL HERNON · Mar 17, 2006

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Tman2002 said:
I've been thinking about this ok 1 pound= about 454 grams, and a gram of fat is 9 calories. So 454x9=4086 but I've always been told/taught that you must burn 3500 cals to burn a pound of fat. So what about the extra 586?

A gram of DIETARY FAT is around 9 grams. Very different then bodyfat. Yes, 3500 calories approx. to lose 1 pound of fat if that is all that is being used for energy.

ag-guys · Mar 17, 2006

Tman2002 said:
I've been thinking about this ok 1 pound= about 454 grams, and a gram of fat is 9 calories. So 454x9=4086 but I've always been told/taught that you must burn 3500 cals to burn a pound of fat. So what about the extra 586?

What about glycogen though, or is this in ketosis?

AG
www.ag-guys.com

PharmD27 · Mar 20, 2006

Tman2002 said:
I've been thinking about this ok 1 pound= about 454 grams, and a gram of fat is 9 calories. So 454x9=4086 but I've always been told/taught that you must burn 3500 cals to burn a pound of fat. So what about the extra 586?

1 g bodyfat = 7.7 kcals

As stated above, they are different. Adipose tissue (body fat) also includes protein, connective tissue, and water. Fat in food terms is pure.