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Sleep in Middle and High School Students
Children and adolescents who do not get enough sleep have a higher risk for many health and behavior problems. Learn how much sleep students need and how many are not getting it.
Children and adolescents who do not get enough sleep have a higher risk of obesity, diabetes, injuries, poor mental health, and problems with attention and behavior.1-4
How much sleep someone needs depends on their age. The American Academy of Sleep Medicine has recommended that children aged 6–12 years should regularly sleep 9–12 hours per 24 hours and teenagers aged 13–18 years should sleep 8–10 hours per 24 hours.1
CDC analyzed data from the 2015 national and state Youth Risk Behavior Surveys.5 Students were asked how much sleep they usually got on school nights. Students who were 6 to 12 years old and who reported sleeping less than 9 hours were considered to not get enough sleep. Teenagers aged 13 to 18 years who reported sleeping less than 8 hours also were considered to not get enough sleep.
Students who get enough sleep may have fewer attention and behavior problems.
Parents can support good sleep habits such as:
How much sleep someone needs depends on their age. The American Academy of Sleep Medicine has made the following recommendations for children and adolescents1:
Zzzzzz … Sleepy Kids: Most Students Need More Sleep. Many middle school and high school students do not get the sleep they need.
Wheaton et al. MMWR. Jan 2018.
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KidsHealth /
for Parents
/ Sleep Problems in Teens
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Most teens don't get enough sleep, usually because their schedules are overloaded or they spend too much time texting or chatting with friends until the wee hours of the morning. Other teens try to go to sleep early, but instead of getting much-needed rest, they lie awake for hours.
Over time, nights of missed sleep (whether they're caused by a sleep disorder or simply not scheduling enough time for the necessary ZZZs) can build into a sleep deficit (or sleep debt). Teens with a sleep deficit can't concentrate, study, or work effectively. They also can have emotional problems, like depression.
As we sleep, our brains pass through five stages of sleep. Together, stages 1, 2, 3, 4, and REM (rapid eye movement) sleep make up a sleep cycle. One complete sleep cycle lasts about 90 to 100 minutes. So during an average night's sleep, a person will experience about four or five cycles of sleep.
Stages 1 and 2 are periods of light sleep from which a person can wake up easily:
Stages 3 and 4 are deep sleep stages:
The final stage of the sleep cycle is called REM sleep because of the rapid eye movements that occur:
Research shows that teens need about 9 hours of sleep a night. So, a teen who needs to wake up for school at 6 a.m. would have to go to bed at 9 p.m. to reach the 9-hour mark. Studies have found that many teens have trouble falling asleep that early, though. It's not because they don't want to sleep. It's because their brains naturally work on later schedules and aren't ready for bed.
During adolescence, the body's circadian rhythm (an internal biological clock) is reset, telling a teen to fall asleep later at night and wake up later in the morning. This change in the circadian rhythm seems to be due to the fact that the brain hormone melatonin is produced later at night in teens than it is for kids and adults. So, teenagers have a harder time falling asleep.
Sometimes this delay in the sleep–wake cycle is so severe that it affects a teen's daily activities. In those cases it's called delayed sleep phase syndrome, also known as "night owl" syndrome. And if your sleep-deprived teen brings mobile devices into bed, surfing or texting late into the night, the light exposure could also disrupt circadian rhythm and make it harder to sleep.
Changes in the body clock aren't the only reason teens lose sleep, though. Read on to learn about some of the biggest causes of sleep deprivation.
Lots of us have insomnia (trouble falling or staying asleep). The most common cause of insomnia is stress. But all sorts of things can lead to insomnia, including physical discomfort (the stuffy nose of a cold or the pain of a headache, for example), emotional troubles (like family problems or relationship difficulties), and even an uncomfortable sleeping environment (a room that's too hot, cold, bright, or noisy).
It's common for teenagers to have insomnia from time to time. But if insomnia lasts for a month or longer with no relief, doctors call it chronic. Chronic insomnia can be caused by a number of different problems, including medical conditions, mental-health problems, medication side effects, or substance abuse. Many teens with chronic insomnia can be helped by a doctor, therapist, or other counselor.
For some teens, worrying about the insomnia can make it worse. A brief period of insomnia can build into something longer lasting when a teen becomes anxious about not sleeping or worried about feeling tired the next day. Doctors call this psychophysiologic insomnia.
Teens with periodic limb movement disorder (PLMD) or restless legs syndrome (RLS) find their sleep is disrupted by leg (or, less commonly, arm) movements, leaving them tired or irritable from lack of sleep.
In the case of PLMD, these movements are involuntary twitches or jerks: They're called involuntary because the person isn't consciously controlling them and is often unaware of the movement.
Teens with RLS actually feel physical sensations in their limbs, such as tingling, itching, cramping, or burning. The only way they can relieve these feelings is by moving their legs or arms to get rid of the discomfort.
Doctors can treat PLMD and RLS. For some teens, treating an iron deficiency can make the problem go away; others might need to take other types of medication.
This sleep disorder causes a person to stop breathing temporarily during sleep. One common cause of obstructive sleep apnea is enlarged tonsils or adenoids (tissues located in the passage that connects the nose and throat). Being overweight or obese also can put someone at risk for it.
Teens with obstructive sleep apnea might snore, have difficulty breathing, and even sweat heavily during sleep. Because it disrupts sleep, they may feel extremely sleepy or irritable during the day.
Treatment can help teens with sleep apnea, so any who have symptoms (such as loud snoring or excessive daytime sleepiness) should be checked by a doctor.
Gastroesophageal reflux disease (GERD) is another common cause of sleep loss. With GERD, stomach acids move backward up into the esophagus, producing the uncomfortable, burning sensation known as heartburn.
GERD symptoms can be worse when a person is lying down. Even if someone doesn't notice the feelings of heartburn during sleep, the discomfort it causes can still interfere with the sleep cycle. Some people find they are better able to sleep by elevating their head on a few pillows or by taking medications.
If your teen suffers from GERD, it could be interfering with his or her sleep. Talk to a doctor about treatment options or lifestyle changes, such as changes in diet.
Most teens have nightmares on occasion. But frequent nightmares can disrupt sleep patterns by waking someone during the night.
The most common triggers for more frequent nightmares are emotional, such as stress or anxiety. Other things that can trigger them include certain medicines, and consuming drugs or alcohol. Sleep deprivation (getting too little sleep) also can lead to nightmares.
If nightmares are interfering with your teen's sleep, consider having him or her talk to a doctor, therapist, or other counselor.
Teens with narcolepsy are often very sleepy during the day and have sleep "attacks" that may make them suddenly fall asleep, lose muscle control, or see vivid dreamlike images while dozing off or waking up. Nighttime sleep may be disrupted, with frequent awakenings throughout the night.
Narcolepsy can be disturbing because teens fall asleep without warning, making it hazardous to do things like ride a bike or drive. A teens's school, work, or social life can be affected by the unusual sleep patterns.
Narcolepsy is not commonly diagnosed in teens, but many cases go unrecognized. People usually begin to have symptoms between the ages of 10 and 25, but might not be properly diagnosed until 10–15 years later. Doctors usually treat narcolepsy with medicines and lifestyle changes.
It's rare for teens to walk in their sleep; most sleepwalkers are kids. Sleepwalking, which may run in families, tends to happen most often when a person is sick, has a fever, is not getting enough sleep, or is feeling stress.
Because most sleepwalkers don't sleepwalk often, it's usually not a serious problem. Sleepwalkers tend to go back to bed on their own and don't usually remember sleepwalking. (Sleepwalking often happens during the deeper sleep that takes place during stages 3 and 4 of the sleep cycle.)
Sometimes, though, a sleepwalker will need help moving around obstacles and getting back to bed. It's also true that waking sleepwalkers can startle them (but it isn't harmful), so try to guide a sleepwalker back to bed gently.
If your teen seems to be getting enough rest at night but is still feeling tired during the day, it's a good idea to visit the doctor. Excessive tiredness can be caused by all sorts of health problems, not just difficulties with sleep.
If a sleep problem is suspected, the doctor will evaluate your teen's overall health and sleep habits. In addition to doing a physical examination, the doctor will take a medical history by asking about any concerns and symptoms your teen has, and about his or her past health, your family's health, and any medications your teen is taking. The doctor may also do tests to find out whether any conditions — such as obstructive sleep apnea — might be interfering with sleep.
Treatment for sleep problems can vary. Some can be treated with medicines, while others can be helped with special techniques like light therapy (where someone sits in front of a lightbox for a certain amount of time each day) or other practices that can help reset a person's body clock.
Doctors often encourage teens who have sleep problems to make lifestyle changes — like turning off the cellphone or computer before bed, cutting down on caffeine, or avoiding violent video games or movies at night — to promote good sleeping habits.
Note: All information on KidsHealth® is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2021 The Nemours Foundation. All rights reserved.
Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.

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Sleep Teen Xxx