Adolescents and Sleep: What You Need to Know


Studies indicate that people in industrialized nations are becoming increasingly sleep deprived, and the problem is most acute among teens.  In fact, the American Academy of Pediatrics  calls insufficient sleep in teens a public health epidemic.  The sharp rise in chronic sleep loss poses a serious threat to the academic success, health, and safety of our nation’s youth. 

Understanding Adolescent Sleep 

According to the National Sleep Foundation, teens need approximately 8-10 hours of sleep every night in order to function and feel their best. The reality is that a substantial proportion of [American] teens are not even close to obtaining the recommended amount of sleep. 

Key Facts

  • Among 12th graders, approximately 95% of males and females do not get enough sleep. (CDC) 
  • The percentage of students getting insufficient sleep increases as students progress from grades 9 to 12. (CDC) 
  • One study indicates that only 15% of teens get 8 1/2 hours of sleep on school nights. (National Sleep Foundation)

Factors Affecting Adolescent Sleep

It’s important to remember that teens are at an important stage of their growth and development. Unfortunately, there are many social and cultural forces that limit their sleep: 

  • Circadian rhythm shifts. After puberty, adolescents experience a biological shift in their internal clock of about two hours. This means that a teenager who used to fall asleep at 9:00 PM will naturally start falling asleep closer to 11:00PM. It also means waking up two hours later the next morning. 
  • Early school start times. More than 80% of U.S. middle, high, and combined public schools require students to attend class at times earlier than recommended by the American Academy of Pediatrics, Centers for Disease Control and Prevention, and American Medical Association. 
  • Educational obligations. There is a lot of pressure for students to succeed, and many adolescents feel overwhelmed by unrelenting school demands – including homework, sports, and extracurricular activities. They often put off sleep in order to keep up with these demands. As a result, it’s difficult to focus and learn in the classroom the next day. This becomes a vicious cycle in which the whole essence of learning is essentially lost. 
  • Social obligations. Today’s teens live in an “always on” world in which they are constantly connected to various electronic devices. Approximately 92% of U.S. teens have smartphone, and more than one-third of teens bring cellphones into their bedrooms and use them before sleep. This is problematic because digital devices stimulate the mind, and LED screens emit harsh blue light that suppresses melatonin production. This makes it harder for adolescents to fall and stay asleep at all, let alone at a reasonable hour. Research shows that even when teens finally put their phones down, 28% of them still leave their phones on while sleeping, only to be awakened at night by texts, calls or emails. 

“With academic demands and extracurricular activities, the kids are going nonstop until they fall asleep exhausted at night. There is not an emphasis on the importance of sleep, as there is with nutrition and exercise. They say they are tired, but they don’t realize they are actually sleep-deprived. And if you ask kids to remove an activity, they would rather not. They would rather give up sleep than an activity.”  

– Nanci Yuan, MD, director of the Stanford Children’s Health Sleep Center 

The Consequences of Poor Adolescent Sleep and How to Fix it

In order to address the chronic sleep loss in teens, it’s critical to acknowledge the potential consequences of this epidemic: 

  • Sleep deficits can impair students’ ability to focus, learn and create new memories. 
  • Insufficient sleep in teens is associated with obesity, migraines, and immune system disruption. 
  • It can also negatively influence decision making, leading to riskier behaviors including but not limited to smoking, drinking, stimulant abuse, physical fighting, and auto crashes. 
  • Sleep deprivation may affect one’s ability to exercise self-control — over their emotions, impulses and mood.  Many studies have shown that severe sleep debt can trigger depression and/or suicidal ideation.

Tips to improve adolescent sleep:

  • Maintain a regular sleep schedule. Adolescents should go to bed and wake up at about the same time every day – including weeknights and  weekends. They should also make sure that they are getting the recommended 8-10 hours in bed.
  • Take early afternoon naps, but don’t oversleep. 15 to 20minute naps in the early afternoon can be beneficial and provide a jolt of energy. However, sleeping for too long can make it more difficult to fall asleep later at night. 
  • Be mindful of digital devices, especially at night. As tempting as it is to hop on the computer, stream your favorite show, or scroll through social media feeds, these are stimulating activities that can make falling asleep more difficult. Additionally, the LED screens found in digital devices emit artificial blue light — light that can throw your circadian rhythm out of whack and prevent your body from producing melatonin.
  • Avoid caffeine after 2PM. Caffeine is a stimulant that can take the body up to six hours to digest. It’s best to stop consuming caffeine (coffee, tea, soda) in the early afternoon so that your body can more easily relax into a deep sleep later at night.
  • Also avoid alcohol, and drugs. According to Neuroscientist Matthew Walker, drinking is more like anesthesia than real sleep, due to alcohol’s sedative effect. Instead of helping you fall asleep, alcohol merely “sedates you out of wakefulness”.  Similarly, sleeping pills do not provide natural sleep and can damage one’s health, especially if one becomes dependent on prescriptions rather than producing melatonin naturally.

Junk Light, Disrupted Sleep, and Your Health

Exposure melatonin disrupting junk light can have have effects on many aspects of your health

Sleep cycle disruption

Junk light exposure when traveling can disrupt your circadian rhythm. Long-term exposure to light at night which accompanies shift work is listed as a probable carcinogen by the World Health Organization. Light at night has shown to be highly associated with significantly the risk of hormone specific such as cancers of the breast and prostate.


The flickering wavelength of light associated with LEDs and compact fluorescent lights emit blue light that inhibits melatonin production but also create a unique glare that impacts your retina causing eye strain, headaches, and physical and mental fatigue.

Weight Gain

Red light and darkness move leptin and ghrelin into patterns that are (context dependent) associated with less hunger, while blue light does the opposite and can move both into patterns associated with more hunger.

Anxiety/Depression & Depression

Increase in cortisol, the stress hormone, due to circadian disruption. Memory recall is impaired with consistent sleep deprivation and may leave you distracted and not performing your absolute best.

The Importance of Melanopsin Cells

The Key to Better Sleep

detects blue light

The melanopsin cells detect blue light it tells your brain that it is “daytime” and less melatonin is produced.

sending signals to your brain

The signals to your brain to alert brightness and for the brain to increase or suppress the sleep hormone, melatonin.

Light Source

Melanopsin cells can’t differentiate the blue light that occurs naturally form the sun from the junk light emitted from your computer monitor.

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