George Osborne has revealed he wears a special high-tech bracelet that monitors how far he walks as well as his sleeping pattern.
Speaking to journalists in Westminster on Thursday, one eagle-eyed reporter spotted the wristband worn by the chancellor.
"It measures how far you walk but it also measures your sleep patterns," Osborne said. "I always sleep well."
He added: "I was pleased to note yesterday that Michael Gove was also wearing one."
The 'Up' bracelet, manufactured by Jawbone, can be bought for £99. The company describes the wristband as having been designed to "fit seamlessly in people's lives".
"It's a thoughtful combination of engineering and design, custom-made for how we live. UP is both flexible and strong. Sometimes UP needs to slide smoothly under sleeves or bend to accommodate an active lifestyle," the product's website claims.
"Other times it has to be strong enough to stand up to a snowball fight without a problem (or more likely, a few thousand showers). Day and night, UP is right there with you."