Different types of naps. A power nap is a sleep session that happens during the day (ideally between 1:00 to 4:00 PM) lasting between 10 and 30 minutes. Any longer and you run the risk of developing “sleep inertia” — that unpleasant groggy feeling that takes a considerable amount of time to shake off.
Then, are naps good or bad for you?
Actually, naps are good for most people, Mednick says. Her research shows a nap—defined as daytime sleeping that lasts between 15 and 90 minutes—can improve brain functions ranging from memory to focus and creativity. “For some people, naps are as restorative as a whole night of sleep,” she adds.
Is a 90 minute nap good?
Because of this, the one-hour nap is ideal for helping an individual better remember faces, names, and facts. However, a sleep cycle will not be completed in only 60 minutes, so you may not be very alert for some time after waking up. The most ideal nap is the 90-minute nap.