The body mass index (BMI) is a heuristic proxy for human body fat based on an individual’s weight and height. BMI does not actually measure the percentage of body fat. It was devised between 1830 and 1850 by the Belgian polymath Adolphe Quetelet during the course of developing “social physics”. Body mass index is defined as the individual’s body mass divided by the square of his or her height In addition to the many risk factors associated with poor health, reducing body mass index (BMI) will have a considerable and independent impact if you want to reduce the risk of developing ischemic heart disease (IHD). This is the key finding from new research, published in PLoS Medicine, which evaluated the causal relationship between BMI and heart disease in 76,000 individuals.