The body mass index should be abandoned for a more nuanced measure of obesity, a group of global researchers proposed. The controversial BMI is determined by calculating the ratio of weight to height: Between 18.5 and 24.9 is considered healthy, while more than 30 is obese. But the BMI metric is flawed, the scientists argued: For instance, it might class a weightlifter as obese, because it only considers weight and height, not fat levels. They recommended using other measures, such as waist-height ratios or medical tests, to assess fat, not just weight. However, some experts argued that overhauling the obesity definition would be time-consuming, and confuse a public that “likes and needs simple messages.” |