We've Cracked the Weight Loss Formula: Track It, Pay Attention,
and Shave a Few  Source: We've Cracked the Weight Loss Formula:
Track It, Pay Attention, and Shave a Few  Whether we're burning
calories by sweating it out at the gym or resisting the call of
the cupcakes, calories definitely affect our waistlines.
Understanding the fundamentals of calories is about more than
just reaching for the low-cal option. If you're watching your
weight or looking to lose some, here's what you need to know
about calories to keep you going  What's a Calorie? A calorie is
just a form of energy. We burn calories all the time, whether
merely breathing and sleeping or running a seven-minute mile.
Metabolism is the rate at which our bodies use up this energy;
the amount of calories we burn by simply existing is called our
BMR, or basal metabolic rate (calculate your BMR here). Your
BMR, age, and activity level are used to determine how many
calories you should be eating in order to maintain your weight.
If you want to lose weigh