Myth: 

The only reason a person would have a high Body Mass Index (BMI) is because they are obese and unhealthy.

BMI, long a staple of the medical and fitness community, has been coming under greater scrutiny. Although it can be a good guide and measurement tool, it only considers height and weight.

Consider any popular bodybuilding figure. They would be considered very high on the BMI chart. But they don't look fat. Why? BMI assumes we are all the same shape and body frame size.

A more telling measurement is body fat percentage: what portion of your body is made up of storage fat, and what portion is lean body mass (muscle, bone and organs).

Don't ignore BMI, but do take it in context with other measurements.