Overweight due to fat accumulation in the body.

The principal indicator of obesity is the body mass index (BMI).

BMI is calculated by dividing the body weight in kilograms by the square of height in meters (BMI = kg/m2).

The accepted definitions of fat level according to BMI are:

BMI less than 18.5 – underweight

BMI between 18.5 – 24.9 – normal weight

BMI between 25.0 – 29.9 – mild overweight

BMI between 30.0 – 39.9 – substantial overweight

BMI more than 40.0 – severe/morbid obesity

An additional index evaluating the obesity status is the waist to hip ratio (WHR).

Many recent medical studies confirmed the association between obesity and the development of Hypertension, Diabetes, cardiac diseases and certain kinds of cancer.