Sleep Matters | Health Trend in Early Childhood – August 2025

Trend

  • Insufficient sleep is a worldwide epidemic.

Explanation

Only about 1 out of 3 adults in the U.S. report consistently getting the sleep they need.  About 25-30% of our time is spent sleeping during a 24-hour period, so sleep is a valuable part of our day!

The National Survey of Children’s Health (NSCH) looks at how much sleep U.S. children get.  In 2020-2021, Pennsylvania parents were surveyed and 31.9% of children aged 4 months to 14 years were not getting enough sleep (see map below).

A U.S. map displays the prevalence of insufficient sleep among children aged 4 months to 14 years by state for the years 2020–2021. States are color-coded into four categories based on the percentage of children not getting enough sleep: light yellow (24.5%–29.2%), light orange (29.4%–33.4%), medium orange (33.8%–37.4%), and dark orange (37.5%–50.3%). Louisiana has the highest rate at 50%, while Minnesota has the lowest at 25%. The data is sourced from the National Survey of Children’s Health.

Impact

Sleep improves physical health and mental health. It strengthens immunity, improves cognition and regulates emotions. It improves behavioral alertness and performance.

Sleep improves learning and affects early childhood health and well-being.  Creating environments that promote good sleep supports children’s learning, health, and resilience.

Brain-building during sleep

When infants and toddlers sleep, a massive amount of information is being processed by the brain.  Rapid brain architecture, building and scaffolding of neural networks occurs during sleep.  This is why infants and toddlers require more sleep in general. 

Napping

Napping has important benefits and functions for young children.  The restorative processing of memories and emotions occurs ten times more efficiently during sleep.

Napping protects emotional health by helping process conflicting emotions and memories, fostering emotional regulation throughout the day.  Napping is like pressing a “reset” button in young children.  Disruptions or interruptions to napping may cause emotional reactivity and nervous system dysregulation in young children (“grumpiness”).  

Impact of light and temperature on sleep

Exposure to light and electronic screen time can cause sleep problems in young children.

Young children are more sensitive to light than adults because they have larger pupils, and their lenses are more transparent.

In 2018, the Monique LeBourgeois Sleep and Development Lab at the University of Colorado Boulder found that dimming the lights in the hours before bedtime can help children fall asleep.  They found that exposing preschoolers to an hour of bright light before bedtime almost completely shuts down their production of melatonin, a sleep-promoting hormone, for at least 50 minutes after the lights were turned off.

Cooler room and body temperatures are more conducive to deep sleep.  In fact, our bodies pre-emptively lower our body temperatures to reach deep sleep.   Heat waves can cause overly warm temperatures for sleep, leading to fragmented and fitful sleep.   Erring on the side of too cool rather than too hot is better for sleeping.  

Action

Recognize sleeping and napping are not competing priorities for education.  Sleep is foundational for learning and necessary to achieve educational goals.  Lack of sleep makes us forget what we are taught.

Optimize sleep in the early learning setting: monitor lighting, temperature and sounds

Provide consistent and structured routines for napping

  • Draw the blinds, put on soft music to get settled in*
  • Cover the shelves with large blankets
  • Determine the right set-up of who rests near whom
  • Encourage teachers to model restfulness
  • If possible, do not clean, organize, talk (including to resting children) or otherwise move around or engage in activities that suggest it’s not rest time

Spend more time outdoors in natural sunlight – it regulates and balances sleeping patterns  

Read bedtime stories using familiar paper books instead of screens (screens emanate light)

Maintain cooler bedtime temperatures – turn the thermostat down to encourage deep sleep

Avoid over-heating or excessive swaddling of infants

*Acknowledgement: NAEYC online: Robin Temple, Northern Interior Alaska AEYC Executive Director, AK

Credible Resources

References

Robbins R, Grandner MA, Buxton OM, et al. Sleep myths: an expert-led study to identify false beliefs about sleep that impinge upon population sleep health practices.  Sleep Health. 2019;5(4):409-417. doi:10.1016/j.sleh.2019.02.002 

Brown, T. M. et al. Recommendations for daytime, evening, and nighttime indoor light exposure to best support physiology, sleep, and wakefulness in healthy adults. PLoS Biology 20, e3001571 (2022)

An infographic titled "Health Trends in Early Childhood" dated August 2025 focuses on the importance of sleep in young children. The main section, titled "Sleep Matters", is organized into four columns: Trend, Explanation, Impact, and Action. Trend: Insufficient sleep is described as a global epidemic. In Pennsylvania, 2020–2021 survey data shows that 31% of children aged 6 months to 12 years were not getting enough sleep. Explanation: Sleep is critical for infants and toddlers as it supports brain development, including rapid brain architecture building and synaptic strengthening. Impact: Adequate sleep improves physical and mental health, strengthens immunity, regulates emotions, improves behavior, increases attention span, and enhances learning and overall well-being. Action: Recommendations for early learning settings include monitoring nap time length, providing consistent nap routines, increasing outdoor time, maintaining cooler sleep environments, and avoiding overheating or excessive swaddling of infants. The infographic also lists resources from the Center on the Developing Child at Harvard University and the American Academy of Pediatrics (AAP) on safe sleep practices and why sleep matters in early childhood development.
Health Trends in Early Childhood

Sleep Matters | August 2025

About Child Trends in Early Childhood

Welcome to Health Trends in Early Childhood, the monthly release from The Pennsylvania Key, focused on trending health issues related to children birth to age five and their families and caregivers.

Each month, find information about a recent health trend, learn why it is important, discover the impact it has on children, their families and caregivers, and the community, as well as actions we all can take to ensure the health and well-being of children in our communities. Also, find reliable resources to learn more about the issue.

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Disclaimer: This is the most updated information at release time. The information in Health Trends is not a Pennsylvania regulatory requirement for early childhood providers. Pennsylvania early childhood providers with regulatory requirements should contact their Cert rep or the Bureau of Certification.