Think of your metabolism as an engine. It's ability to "run" means biochemical processes that keep us alive are ongoing. Your metabolic rate is the pace at which your body uses energy, which is measured in calories. So it's important to know just how many calories you need to "exist" so you can then decide if you are overeating and therefore gaining weight or under-eating and therefore capable of dropping weight.
What do you specifically need the calories for??
•1- To run...

