A power nap is a brief period of daytime sleep, often targeted at around 10–20 minutes, intended to leave the sleeper refreshed rather than groggy. Napping practices differ across cultures and workplaces, with some people napping regularly and others rarely doing so.
Environmental setup - dim light, comfortable temperature, and a timer - can make short naps more practical. The timing of a nap relative to bedtime and daily schedule is a common consideration for people experimenting with this habit.