You probably know that heavy feeling after a short night. Most of us assume we'll pay it back on the weekend. But the amount of sleep your body actually needs isn't the same at every age.
The reference most US health agencies use comes from a consensus panel of 18 sleep researchers and physicians. Their work was published in the journal Sleep Health in 2015 and now sits behind the ranges cited by the NIH and the CDC.
What the age bands actually say
For young children the ranges cover a full day of sleep with naps included. From school age onward, they refer to nightly sleep.
| Age group | Recommended sleep |
|---|---|
| Newborns (0-3 months) | 14-17 hours |
| Infants (4-11 months) | 12-15 hours |
| Toddlers (1-2 years) | 11-14 hours |
| Preschoolers (3-5 years) | 10-13 hours |
| School-age children (6-13 years) | 9-11 hours |
| Teenagers (14-17 years) | 8-10 hours |
| Adults (18-64 years) | 7-9 hours |
| Older adults (65+ years) | 7-8 hours |
The band narrows with age. Newborns can need as much as 17 hours in a 24-hour window. By the teenage years the target settles around 8 to 10 hours. Most adults land in the 7 to 9 hour range, with a small dip to 7 to 8 hours after age 65.
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Why both too little and too much carry risk
Short sleep is the more familiar problem. The CDC says most adults need at least 7 hours a night, and sleeping less is linked to higher rates of high blood pressure, obesity, type 2 diabetes, heart attack and depression.
Long sleep carries risk too. A systematic review in the Journal of the American Heart Association pooled dozens of prospective cohort studies and found a U-shaped pattern. The lowest risk of early death and cardiovascular events sat around 7 hours a night.
Each extra hour above 7 was tied to a 13 percent higher risk of dying from any cause.
That doesn't mean an occasional long weekend sleep is harmful. A consistent pattern of 9 or 10 hours in healthy adults is often a signal that something else is off. Untreated depression, sleep apnea or chronic illness are worth checking with a doctor.
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Signs you may not be getting enough
The clearest clue is how you feel on days when you sleep as much as you want and wake without an alarm. If that natural sleep length is well above what you usually get, your weekday number is too low.
Other common signs health agencies flag include needing caffeine to function in the morning, nodding off during the day, difficulty concentrating, and relying on weekends to catch up on lost sleep. Nearly a third of US adults consistently sleep fewer than 7 hours a night.
Three habits that help you hit your number
Keep bedtimes and wake times steady, even on weekends. The body's internal clock responds to consistency, not catch-up.
Give yourself a wind-down window of 30 to 60 minutes. Common sleep-hygiene guidance from US health agencies highlights a cool, dark bedroom and avoiding alcohol and caffeine in the hours before bed.
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Treat loud snoring, long pauses in breathing and chronic insomnia as medical issues worth raising with a doctor. They are among the most common reasons people hit the hours on paper but still wake unrested.
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This article is made and published by Jesper Bengtson, who may have used AI in the preparation.