ANS, autonomic nervous system-the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands.
Underweight: Your BMI is less than 18.5. Healthy weight: Your BMI is 18.5 to 24.9. Overweight: Your BMI is 25 to 29.9. Obese: Your BMI is 30 or higher. The chart below shows examples of body mass indexes. The figure at which your height corresponds with your weight is your body mass index. To find yours, consult the chart, or use WebMD's BMI calculator.
Commonly accepted BMI ranges are underweight: under 18.5, normal weight: 18.5 to 25, overweight: 25 to 30, obese: over 30. There are criticisms of using the BMI to define obesity in individuals. One is that the BMI was designed for population studies, not individuals. Another is that body fat percentage (BFP) is a more reliable indicator of obesity than BMI: very muscular, lean (low body fat) individuals can be classified as obese using BMI, but are classified as having a normal weight using BFP.