BMI doesn't tell the full story of health, says a new University of Waterloo study. The measure may reinforce bias and ...

A healthy weight can depend on many factors, including your age, sex, muscle mass, bone mass, and lifestyle. Some measures, like body mass index (BMI), do not take all of these measures into account.

People who regularly weigh themselves may notice that the number on the scale changes, depending on when they do it. In fact, a person’s body weight can change within a single day. The National ...