Almost 70% of US adults would be deemed obese based on new definition, study finds

Medical experts have called for new way to more accurately measure obesity, although definition has yet to be adopted

Almost 70% of adults in the US would be deemed to have obesity based on a new definition, research suggests.

The traditional definition of obesity, typically based on having a body mass index (BMI) of 30 or greater, has long been contentious, not least as it does not differentiate between fat and muscle.