Sleep experts are not fans of the morning snooze. The idea is that setting up multiple alarms, starting earlier than the time you have to get out of bed, can prematurely wake you from deep sleep. And if you’re snoozing beyond the time you actually meant to get out of bed, that may be a signal that you’re not getting enough rest at night, says Philip Cheng, a sleep expert at Henry Ford Health.
But when Stephen Mattingly—a serial snoozer who completed his Ph.D. in cognition at the University of Notre Dame and then became a postdoctoral researcher at the university—turned to the scientific literature to see if the data backed up those warnings, he couldn’t find much.
Studies have shown that sleep fragmentation at night can be worse than a short, uninterrupted sleep. Napping may also help improve heart health and reverse some of the effects associated with sleep loss. Nighttime sleep or daytime napping are not the same thing as sleeping in first thing in morning.
Mattingly found only one study that relates snoozing to a specific…