Most people have seen the letters BMI on a health form, fitness app, or medical report. The number is often presented beside a label such as “healthy weight,” “overweight” or “underweight,” but the ...

A new study suggests the body mass index (BMI)—which has been the standard tool used to classify overweight and obesity for decades—may soon have competition. Researchers from Istanbul have developed ...

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.