Midday Naps Linked to More Happiness, Better Self-Control, and Higher Academic Scores in 10–12-Year-Olds

Summary: A new analysis of nearly 3,000 children shows that brief midday naps are associated with improved mood, greater self-control and grit, fewer behavioral problems, and higher cognitive and academic performance—especially in older elementary students.

Source: University of Pennsylvania

Parents have long observed that naps can improve a child’s mood, energy, and school performance. New research from the University of Pennsylvania and the University of California, Irvine, published in the journal SLEEP, provides large-scale evidence supporting those observations.

Key Findings

Researchers analyzed data from 2,928 children in grades 4 through 6 (ages 10–12) and found consistent associations between habitual midday napping and a range of beneficial outcomes. Children who napped three or more times per week showed:

• Higher reported happiness, grit, and self-control
• Fewer internalizing behavioral problems (such as anxiety or withdrawal)
• Better verbal IQ scores for some subgroups, with the strongest academic gains observed in sixth graders
• Notable improvements in academic achievement—an average 7.6% increase in Grade 6 performance for those who napped frequently

“The more students sleep during the day, the greater the benefit of naps on many of these measures,” commented one of the study’s authors.

While some outcomes—such as performance IQ and metabolic measures—did not show significant associations with napping, the study highlights a broad positive pattern across cognitive, psychological, and behavioral domains.

Study Design and Methods

The research team used data from the China Jintan Cohort Study, which began in 2004 and follows children from early childhood through adolescence. In 2011, weekly nap frequency and average nap duration were recorded for students in grades 4–6. Outcome measures were gathered as the children reached grade 6 and included:

• Teacher-rated behaviors and academic achievement
• Self-reported measures of happiness, grit, and self-control
• IQ testing for a subgroup of students
• Physical exams measuring body mass index and fasting glucose

Analyses adjusted for sex, grade, school location, parental education, and nightly time in bed. The study included both cross-sectional and stratified analyses by grade to explore how associations varied over time and by age.

Context and Cultural Factors

Unlike many Western countries where napping typically decreases as children age, napping is culturally entrenched in China and often continues through elementary and middle school. That cultural context allowed researchers to study habitual midday naps in older children—an age group that has been underrepresented in prior sleep research, which often focuses on preschoolers.

Implications and Future Directions

Because the study is observational, it cannot prove causation. Nonetheless, the findings suggest midday naps could be a practical, low-cost strategy to help reduce daytime sleepiness and support children’s cognitive and emotional health. The authors note that naps are easy to implement and may be paired with slightly later school end times to avoid cutting into instructional time while also reducing evening screen use.

Future research should explore why children of more highly educated parents nap more often, how culture and personality influence napping habits, and whether structured nap interventions can produce causal improvements in academic performance and well-being. A randomized controlled trial would be the ideal next step to test causality, but such trials have not yet been conducted for this age group and setting.

Funding and Research Team

Funding for the study came from the National Institutes of Health: the National Institute of Environmental Health Sciences (grants R01-ES018858, K02-ES-019878, and K01-ES015877) and the National Institute on Aging (grant R01-AG046646).

Principal investigators and contributors include Jianghong Liu (associate professor of nursing and public health, University of Pennsylvania), Adrian Raine (Richard Perry University Professor of Criminology, Psychiatry, and Psychology, University of Pennsylvania), Rui Feng (associate professor of biostatistics, University of Pennsylvania), and Sara Mednick (associate professor of cognitive science, University of California, Irvine). Additional collaborators include Xiaopeng Ji and Naixue Cui.

Original Research: “Midday napping in children: Associations between nap frequency and duration across cognitive, positive psychological well-being, behavioral, and metabolic health outcomes.” Authors: Jianghong Liu, PhD; Rui Feng, PhD; Xiaopeng Ji, PhD; Naixue Cui, PhD; Adrian Raine, PhD; Sara C. Mednick, PhD. Published in Sleep. DOI: 10.1093/sleep/zsz126

Abstract summary: The study examined midday napping habits in elementary school children and their associations with cognitive, psychological, behavioral, and metabolic outcomes. Results suggest regular napping is associated with better emotional well-being, higher verbal IQ for some groups, improved self-control and grit, fewer internalizing behavior problems, and higher academic achievement. The authors emphasize the need for large-scale intervention studies to determine causal effects.