A nap is a form of biphasic or polyphasic sleep, where the latter terms also include longer periods of sleep in addition to one single period. Cultural attitudes toward napping during the work day vary. A nap is a short period of sleep, typically taken during daytime hours as an adjunct to the usual nocturnal sleep period. Naps are most often taken as a response to drowsiness during waking hours. In many Western cultures, children and the elderly are expected to nap during the day and are provided with designated periods and locations in which to do so. In these same cultures, most working adults are not expected to sleep during the day and napping on the job is widely considered unacceptable.
Other cultures (especially those in hot climates) serve their largest meals at midday, with allowance for a nap period (siesta) afterward before returning to work. A daytime nap, when taken correctly, can be a powerful tool for improving both physical and mental well-being. Rather than being a sign of laziness, short naps can help recharge the body and mind, making the rest of the day more productive and balanced. A short nap helps reduce fatigue and restores energy levels. It can improve alertness, reaction time, and focus, especially during the post-lunch energy dip many people experience.
