New Delhi, March 4 -- Obesity and being overweight are common conditions that are associated with excessive body fat. They are caused by factors such as genetics, family history, eating habits, lack of physical activity or movement. Body mass index or BMI is used to know if a person is overweight or obese. It is a measure of body fat based on a person's weight and height. It is defined as the person's body mass (in kilograms or kg) divided by the square of the individual's height (in meters). Obesity and overweight go beyond the BMI. On World Obesity Day, which is observed on March 4, we tell you the differences between obesity and overweight.

What is obesity?

Obesity is a medical condition characterised by excessive accumulation of bod...