Keep it short and before 3pm: what the sleep scientists say about naps

A 20 to 25-minute nap can be restorative, but if you sleep any longer you may wake up feeling groggy, say the experts. Photograph: Alamy

A 20 to 25-minute nap can be restorative, but if you sleep any longer you may wake up feeling groggy, say the experts. Photograph: Alamy

source https://www.theguardian.com/lifeandstyle/2021/aug/27/keep-it-short-and-before-3pm-what-the-sleep-scientists-say-about-naps