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.
BMI and Obesity. BMI categories help evaluate the degree of obesity in a particular person. A person with a BMI of 18.5 to 24.9 is considered to be in the healthy range. An individual with a BMI of 25 to 29.9 is considered overweight, and a person with a BMI of 30 or more is considered obese.