Carley Millhone is a writer and editor based in the Midwest who covers health, women's wellness, and travel. Her work has appeared in publications like SELF, Greatist, and PureWow. Polyphasic sleep ...

So how might a nap help? Recordings of brain and ocular electrical activity monitored while napping revealed that the longer 1-hour naps contained more than four times as much deep, or slow wave sleep ...

If you're a fan of an afternoon snooze but sometimes wake up feeling even groggier, you might be wondering how long a nap should be to actually help revive you. A nap can be really good for you if you ...