Welcome to the Get Fit Guys' quick and dirty tips to get moving and shape up.

My name is Brock Armstrong and I am the Get Fit Guy.

As widespread as the BMI method of body measurement is,

the ever-growing consensus is that this one-size-fits-all approach may actually be flawed. Body mass index, or BMI, is a mathematical

formula that divides a person's weight by the square of their height to arrive at a number that

falls into one of the following body weight categories. Very severely underweight, severely underweight, just plain underweight,

normal, a healthy weight, overweight, obese class 1, which is also known as moderately obese,

obese class 2, which is severely obese, and finally obese class 3, which is very seriously obese.

Beyond assigning one of these categories,

a high BMI can also be an indicator of high body fat

and therefore can be used to screen for certain weight levels

that could lead to health problems.

Now, even though it is often used as one,

it is not a true diagnostic of body fatness

or of an individual's overall health.

As most of us fitness-focused folks have likely heard,

BMI is far from a perfect measurement.

Much of the time, and often when it really counts, the BMI measurement

may actually overestimate or even underestimate a person's body fat. And when it does, it

really does, and we'll find out more about that later. A common example that people use when they're

talking smack about BMI is that it doesn't distinguish

between body fat and muscle mass, which is important because a hunk of muscle weighs more than

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