The Body Mass Index is one of the most ridiculously misleading calculations still used in the modern medical community. It was invented in the early 19th century by a Belgian dude named Lambert Adolphe Jacques Quetelet, who was a mathematician, not a physician. The formula was used to measure the degree of obesity in the general population for the purposes of assisting the government in allocating resources. It is defined as a person’s body mass divided by the square of their height (kg/m2). The biggest problem is that it ignores the ratio of muscle to fat in the body. That’s a big deal when you realize that muscle is 18% denser than fat, and healthier.