What is BMI?
BMI is a mathematical formula, based on height and weight, to help doctors determine if someone is at a healthy weight or not. The problem is the BMI does not take body fat and muscle mass into consideration. Basically, it’s just measures how much mass you take up in space for your height. If you are over the limit, you are labeled “overweight” no matter what how low your body fat is. -http://pfitblog.com