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Body Mass Index (BMI)

Body Mass Index (BMI) is an assessment of body weight relative to height. Evidence has shown that an elevated BMI increases risk for such diseases as cancer, diabetes mellitus, hypertension, hypercholesterolemia, and atherosclerosis. Research has proven that the higher your BMI, the greater the risk for a premature death. A healthy BMI is 20.0 – 24.9 kg/m 2. A BMI of at least 27 kg/m 2 indicates obesity and increased health risk. A BMI of 30.0 kg/m 2 indicates grade II obesity, while 40.0 kg/m 2 and greater is morbid obesity. To calculate your BMI, click here.

Important Limitations of BMI :

  • BMI does not distinguish between fat mass and fat free mass. This is important because the American College of Sports Medicine (ACSM) defines obesity as a percent of body fat at which disease increases. People with large amounts of lean tissue may have a high BMI while having their body fat percentage in a healthy range. In addition, a healthy BMI does not necessarily mean that body fat is within a healthy range.
  • BMI does not give any information on the location of the body fat which is important in determining obesity-related risk for disease.