Way back in 1998 I became overweight in just one day. It wasn't because I had gone on a binge of eating and drinking. Rather it was because a committee convened by the National Heart Institute redefined overweight to be a body mass index (BMI) of 25 or more for both men and women. Body mass index is calculated by dividing a person's weight in kilograms by the square of the person's height in meters. If you prefer to use English units, its your weight in pounds divided by the square of your height in inches, then multiplied by 703.
