Have you struggled to lose weight without much success, or perhaps shed a few pounds only to gain them back—and then some? It turns out, it's not your fault.

In 2023, two major studies found something surprising—almost every overweight person had one thing in common: not getting good sleep. And the one thing most lean people shared? A full, deep night’s rest.

Not getting enough sleep doesn’t just make you feel like crap—it can actually mess you up more in the long run than smoking, according to research from Harvard and Yale.

Even if you think you’re sleeping fine, your body might not be getting the deep, restorative sleep it needs to keep the weight off and stay toned.

When you’re sleeping well, burning fat feels easy and natural. But when your sleep’s off, your metabolism slows down, you feel hungrier, and your body starts aging faster.

Curious how better sleep can change your body? Check out the video above—it’s got all the good stuff you need to know!