6 RULES TO LIVE BY

From step counts and BMI to five-a-day, we review which figures add up

Staying fit is a numbers game, but with the news cycle constantly churning out new ones, it’s hard to know which of them count. Our experts have interrogated some of the most commonly cited – and often unquestioned – figures to see how they hold up against the science. Here’s all you need to know to look out for number one