Additionally, Dr. Michos points out, measuring waist circumference may provide a more vivid indication of weight-loss progress.

CNN: The best way to measure body fat

Hollywood used to have a set of numbers -- waist circumference, face shape, beard length -- that Santas were supposed to adhere to, Kliner said.

CNN: Should Santa Claus still be fat?

Conversely, if a tape measure reveals a decrease in waist circumference, you can see the benefit and know you're improving your health, which can also motivate you to continue an exercise and diet plan.

CNN: The best way to measure body fat

The circumference of your waist and most importantly, your body mass index are dead giveaways when it comes to knowing the amount of body fat you have, and the health risks you might run into because of it.

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