WHAT BMI MEANS
Body mass index (BMI) is a formula that uses weight and height to estimate body fat. Excess body fat is related to serious health conditions. For most people, BMI provides a reasonable estimate of body fat. The BMI's biggest weakness is that it doesn't consider individual factors such as bone or muscle mass. BMI may:
Underestimate body fat for older adults or other people with low muscle mass
Overestimate body fat for people who are very muscular and physically fit
Inadequately evaluate health risks of people with excess abdominal fat
In addition, people of Asian descent may have an increased risk of health problems at a lower BMI threshold than the general population. Asians with a BMI of 23 or higher may be at risk.
Talk with your doctor if you have questions about your BMI.