Most Kids and Teens Are Not Getting Enough
Even though scientists know exactly how much sleep young people need, surveys show that most kids and teenagers fall short of those recommendations. About 73% of American high school students sleep less than 8 hours on school nights, which is below the minimum recommended amount. Younger kids often do better, but many school-age children still miss the 9-hour mark regularly. Sleep loss among students has been getting worse over the past few decades, partly because of increased homework, activities, and screen time. When entire generations of kids are under-sleeping, the effects show up in classrooms, on sports fields, and in doctors’ offices.
Why Teenagers Struggle With Early Mornings
If you have an older sibling or know a teenager who seems impossible to wake up in the morning, there is a scientific reason for that. During puberty, the brain’s internal clock, called the circadian rhythm, shifts later by 1 to 2 hours. This biological shift means that most teenagers physically cannot fall asleep before about 11 pm, even if they try. When school starts at 7:30 or 8:00 in the morning, teens are forced to wake up during what their body considers the middle of the night. This is not laziness; it is biology working against early school schedules.
Schools Are Starting to Listen
The American Academy of Pediatrics has recommended that middle and high schools start no earlier than 8:30 am to give students a better chance of getting enough sleep. School districts that have pushed their start times later have seen real improvements: students earn better grades, attendance goes up, and there are fewer car accidents among teen drivers. California became the first state to pass a law in 2019 requiring high schools to start no earlier than 8:30 am and middle schools no earlier than 8:00 am. While changing school schedules is complicated, the science clearly shows that later start times lead to healthier, more successful students.
Signs You Are Not Getting Enough Sleep
Your body gives you signals when you are not getting the sleep you need, but many people have been tired for so long that they do not recognize the signs. If you feel drowsy during the day, especially in warm classrooms or while reading, that is a strong sign you need more sleep. Falling asleep within 5 minutes of lying down might sound like a good thing, but it actually means you are overtired, since a well-rested person takes 10 to 15 minutes to drift off. Other warning signs include needing an alarm clock to wake up every morning, having difficulty concentrating in class, and feeling cranky or emotional for no clear reason.
Not Everyone Needs the Same Amount
While the recommended ranges give good guidelines, individual sleep needs can vary from person to person. A very small number of people, estimated at less than 3% of the population, are genuine short sleepers who can function well on just 6 hours of sleep per night. This trait appears to be genetic and is linked to a specific gene mutation that scientists have identified. However, most people who claim they are fine on 6 hours are actually running on a sleep deficit without realizing it. Research shows that chronically sleep-deprived people consistently rate their own performance as fine even when tests show they are significantly impaired.
How to Know If You Are Getting Enough
The best way to figure out if you are getting enough sleep is to pay attention to how you feel during the day. If you wake up feeling refreshed without an alarm, stay alert through the afternoon, and have steady energy throughout the day, you are probably getting the right amount. Try an experiment during a vacation or long break: go to bed at a reasonable time and let yourself wake up naturally without an alarm for several days in a row. After a few days of catching up, the time you naturally wake up will show you how much sleep your body truly needs. Most kids who try this discover they need more sleep than they were getting during the school year.
Making a Sleep Schedule That Works
Once you know how much sleep you need, you can work backward from your wake-up time to figure out when you should be in bed. If you need to wake up at 6:30 am for school and your body needs 10 hours of sleep, you should be falling asleep by 8:30 pm. Since it takes most people 10 to 15 minutes to fall asleep, you would want to be in bed with the lights out by about 8:15 pm. Keeping the same bedtime and wake-up time every day, including weekends, helps your circadian rhythm stay consistent. A regular schedule makes it easier to fall asleep, easier to wake up, and helps you feel more energetic throughout the day.
OtterKnow Kids Encyclopedia