Should we ditch BMI and use the ‘body roundness index’ instead?

By Alice Bullas, Senior Research Fellow, Sports Engineering Research Group, Sheffield Hallam University

Body mass index (better known as BMI) has long been used to get a quick and easy snapshot of a person’s body fat levels. To calculate someone’s BMI, you divide their weight in kilograms by their height in metres times itself. The resulting number is used to determine a person’s health risk.

Although there are far better ways of getting an accurate measure of a person’s body fat levels – such as using dual-energy x-ray absorptiometry (Dexa) or magnetic resonance imaging (MRI) – these are very resource-intensive.…

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