Just got a new mattress and wondering why sleep feels a little off? That's completely normal. Your body needs time to adjust — and so does the mattress itself. Here's what to expect in the first few weeks, and how to make the break-in period as smooth as possible.

You wake up tired. Your back aches. You've tried everything, earlier bedtimes, no screens, herbal teas. But what if the real problem is what you're sleeping on? Sleep researchers have spent decades studying the link between mattress comfort and restorative sleep.