definition of obesity and bmi
The terms overweight and obesity refer to body weight thatâs greater than what is considered healthy for a certain height. The most useful measure of overweight and obesity is body mass index (BMI). BMI is calculated from your height and weight. Overview.
The body mass index (BMI) or Quetelet index is a value derived from the mass (weight) and height of an individual. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m2, resulting from mass in kilograms and height in metres.