According to new studies, measuring a person's 'body roundness index' shows promise as a way to measure obesity and health ...

The situation is more complex in children, where the BMI threshold of obesity varies with age and sex. The charts below show how the BMI obesity threshold changes with age for boys and girls.

Body mass index (BMI) can help you see if your weight is raising your risk for health problems. It uses a formula to compare how much you weigh with how tall you are. A BMI lower than 18.5 is ...