Why is my BMI score “obese” if I am a body builder with little body fat?

There are some people for whom BMI is not an appropriate measurement device. In fact, BMI is used as a screening tool to identify possible weight problems for adults, but it is not a diagnostic tool. To determine if excess weight is a health risk for a person with a high BMI a healthcare provider performs further assessments. These assessments might include skin fold thickness measurements (or another assessment of body composition), diet, physical activity, family history, and other appropriate screenings. Your BMI may be high but you may not have a greater disease risk because your weight is not a result of high body fat.