Napping on Memory and Cognition

Napping occupies a complex position in contemporary society, where it is often perceived as a sign of laziness, leading nearly half of American adults to deliberately avoid the practice. In contrast, adequate sleep is consistently recommended due to its well-documented restorative functions, including metabolic regulation, reduced cardiovascular risk, and enhancements in memory and attention. Although naps are significantly shorter than nocturnal sleep, typically ranging from 10 to 120 minutes, a growing body of research suggests that napping confers comparable physiological and cognitive benefits. Longitudinal evidence from populations where habitual napping is culturally embedded, such as Spain, indicates that individuals who engage in a daily 30-minute siesta exhibit a substantially lower risk of obesity. Despite these benefits, napping is associated with potential drawbacks, including sleep inertia and disruptions to nighttime sleep, which may explain the variability in optimal napping conditions and its limited endorsement within workplace environments. This review examines the multifaceted nature of napping, with a particular focus on its cognitive implications. Current findings strongly support the role of short naps in enhancing memory, attention, and other cognitive functions, while highlighting the conditions under which these benefits are maximized.