ANS, autonomic nervous system-the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands.
BMI stands for Body Mass Index. This is a numerical value of your weight in relation to your height. A BMI between 18.5 and 25 kg/mÂ² indicates a normal weight. A BMI of less than 18.5 kg/mÂ² is considered underweight. A BMI between 25 kg/mÂ² and 29.9 kg/mÂ² is considered overweight. A BMI of 30 kg/mÂ² or higher is considered obese. Excess weight increases the heart's work. It also raises blood pressure and blood cholesterol and triglyceride levels and lowers HDL (good) cholesterol levels.
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.