ABC of BMI

BMI, or body mass index, is a measure of body fat based on height and weight.

But just like your weight, you should not let your BMI be your only measure of fitness. Not all adults who have a healthy BMI are at their most healthy weight. They may have lots of fat but very little muscle, and some athletes encounter the opposite problem.

A BMI, however, does give many people a good idea of whether or not they are in good health condition.