Kate Middleton’s fitness secret

A variation on the hugely popular Atkins diet – high protein and low carb – the Dukan diet already has several famous fans, including Hollywood A-listers Jennifer Lopez and Nicole Kidman.

The four-stage diet consists of a series of phases – attack, cruise, consolidation and stabilisation – whereby foods are withdrawn and then slowly re-introduced.

According to the Dukan diet website, the phases enable the dieter to lose then maintain the correct level of weight for body type.