How Much Sleep Do Kids and Teens Really Need?

Sleep may be the only recovery tool parents regularly cancel to make room for more recovery activities.

One more practice. One more class. One more homework assignment. Bedtime gets pushed back 15 minutes at a time, and everyone is surprised when the child wakes up moving at the speed of airport Wi-Fi.

Sleep is non-negotiable in our house.

Even on my son’s three-hour gymnastics days, he eats dinner during the drive home. Once we arrive, it is shower, teeth, books and bed.

I cannot create an extra hour. I can stop traffic and dinner from stealing one.

How Much Sleep Do Kids Actually Need?

The American Academy of Sleep Medicine’s recommendations, endorsed by the American Academy of Pediatrics, count all sleep within 24 hours, including naps.

These are ranges, not bonus points. Some children function well near the lower end; others clearly need more.

The useful question is not: What is the minimum my child can survive on?

It is: How much sleep allows this child to wake up, learn, exercise and manage emotions without looking personally offended by the morning?

Regularly getting too little sleep is associated with problems involving attention, learning, mood, behavior and physical health.

Use This Bedtime Formula

Start with the required wake-up time and count backward:

Lights-out time = Wake-up time − Sleep target − Time needed to fall asleep

Example:

• Wake-up time: 7:00 a.m.
• Sleep target: 10½ hours
• Time needed to fall asleep: 15 minutes

Lights out: 8:15 p.m.

If the bedtime routine takes 30 minutes, it should begin around 7:45.

The math is not sophisticated. It is just inconvenient.

A 9:30 bedtime cannot produce 10 hours of sleep before a 7:00 wake-up, no matter how optimistic the parent.

Does Sleep Help Kids Grow Taller?

Sleep cannot make a child taller than their genetic potential. But adequate sleep is part of the normal environment required for growth and recovery.

Growth hormone is released in pulses, with an important sleep-related surge commonly occurring soon after sleep begins, around the first period of slow-wave—or deep—sleep.

That does not mean sleep before midnight is magically worth twice as much.

The body responds to sleep stages, not the clock striking 12.

There is no special height window that closes at midnight. The practical problem with a very late bedtime is much simpler:

Late bedtime + fixed school wake-up time = less total sleep.

Six Habits That Make the Biggest Difference

1. Keep the schedule reasonably consistent

Try to keep bedtime and wake-up time similar from day to day.

It does not need to be exact to the minute. But shifting the schedule several hours every weekend can make Monday feel like jet lag without the vacation.

A consistent sequence matters too: shower, pajamas, teeth, book, bed. The routine does not need 14 steps, lavender mist and professionally recorded whale sounds. It needs to be repeatable.

2. Turn off screens one hour before bed

According to the AAP, children should avoid screens for at least one hour before bedtime and devices should ideally charge outside the bedroom. Evening screen light can delay natural melatonin signals, while scrolling, games and notifications keep the brain engaged.

Our rule is simple: The phone needs a bedtime, too.

3. Get real light in the morning

According to the AAP, bright morning light helps set the body clock and keeps the sleep-wake schedule on track.

Open the curtains. Eat breakfast near a bright window. Step outside before school when possible.

The first light a child sees every morning should not always come from a tablet.

4. Make the bedroom dark and cool

We do not use nightlights in our children’s rooms.

Darkness helps the brain recognize nighttime. Blue-white light from screens—and even some bright nightlights—can interfere with melatonin release.

When a child truly needs a nightlight, use one that is:

• Very dim
• Warm amber or reddish
• Positioned low
• Pointed away from the child’s face

The goal is comfort, not airport-runway illumination.

5. Simplify late-training nights

Daily physical activity generally supports sleep, but hard exercise close to bedtime can leave some children too alert to settle immediately.

When practice ends late, remove everything unnecessary from the evening.

For us, that means: Dinner in the car → shower → teeth → books → bed

Do not finish a three-hour practice and then begin a 90-minute family dinner production.

6. Watch caffeine and late heavy meals

According to the AAP, caffeine can remain active for many hours, so teens with sleep problems should avoid it after lunchtime. Large, greasy or spicy meals close to bedtime may also make settling harder.

But there is no good reason to send a genuinely hungry child—especially a young athlete—to bed.

A small snack is fine when needed:

• Milk and a banana
• Yogurt and fruit
• Toast with nut butter
• Cheese and crackers
• Half a sandwich

There is no solid evidence that an ordinary bedtime snack or glass of milk blocks normal nighttime growth hormone.

Finish eating, brush teeth and go to bed.

The Sleep-Training Method That Worked for Us

Both of my children used the Ferber sleep-training method.

Across two children, we actually used it three times: once with each child as a baby, and once again when my daughter was three and needed a sleep reset.

Our pediatrician strongly recommended the method and told me it was what they had used with their own child. We followed the graduated-check-in approach explained in Dr. Richard Ferber’s book, Solve Your Child’s Sleep Problems.

It worked extremely well for our family. Both children learned to fall asleep independently, have slept in their own rooms from an early age and generally sleep deeply and consistently.

A randomized trial published in Pediatrics found that graduated check-ins reduced the time children took to fall asleep and decreased nighttime waking, without evidence of harmful stress responses or adverse effects on attachment or behavior at follow-up. A separate five-year follow-up also did not find meaningful long-term harms.

It is not the only possible approach. But for our family, I recommend learning about it enthusiastically.

Melatonin Is Not a Nightly Vitamin

Melatonin can be useful for particular circadian problems or short-term schedule adjustments. It should not automatically become the answer every time a child resists bedtime.

According to the AAP, short-term use appears relatively safe, but much less is known about long-term use in children, especially during growth and puberty. The AAP also emphasizes that melatonin should not replace a workable bedtime routine.

Some experts believe that taking melatonin long term may reduce the body’s own melatonin production.

The stronger concerns are that long-term pediatric safety data remain limited, timing and dosage matter, and nightly use can become a workaround for problems caused by screens, inconsistent schedules or too little time in bed. Reviews of longer-term use have found limited and mixed evidence regarding pubertal development, with more research still needed.

My approach is:

Fix the schedule, light, screens and routine before reaching for a nightly hormone.

Magnesium, B6 and B12

At our house, we use 100 mg of magnesium before bed as part of our wind-down routine. We find it helpful for relaxation and recovery. Magnesium supports normal muscle and nerve function, energy production and bone development.

Vitamin B6 helps the body produce and regulate neurotransmitters, including serotonin, and participates in pathways involved in melatonin production.

Vitamin B12 supports normal nervous-system function, red blood cell production and energy metabolism. A deficiency can contribute to fatigue and neurological symptoms.

These nutrients support systems involved in daily energy, relaxation and recovery. They do not replace enough time in bed.

One sleep problem deserves special attention rather than another bedtime hack: regular loud snoring, gasping or pauses in breathing should be discussed with a pediatrician because they may signal sleep apnea.

I spent three months working with ENT doctors to address my daughter’s persistent nasal congestion and snoring—because even a child who stays in bed for ten hours may not be getting ten hours of restorative sleep if breathing is repeatedly disrupted.

What Matters Most

Children do not need a flawless evening.

They need enough opportunity to sleep, most nights, in an environment that makes sleep possible.

At our house, that sometimes means dinner in the car after practice. It means screens off, morning light, a dark bedroom and bedtime calculated backward from morning—not based on when the adults finally finish everything.

Choose the wake-up time. Count backward. Protect the hours. Repeat.

Sleep is not leftover time.

For a growing child, it is part of the work.

Sources

• American Academy of Sleep Medicine, Recommended Amount of Sleep for Pediatric Populations.
• American Academy of Pediatrics, Healthy Sleep Habits: How Many Hours Does Your Child Need?
• American Academy of Pediatrics, Melatonin for Kids: What Parents Should Know About This Sleep Aid.
• American Academy of Pediatrics, Sleep and Health: Why Rest Matters for Your Child—and Your Whole Family.
• Gradisar et al., Behavioral Interventions for Infant Sleep Problems.
• Price et al., Five-Year Follow-up of Harms and Benefits of Behavioral Infant Sleep Intervention.
• NIH Office of Dietary Supplements, Magnesium, Vitamin B6 and Vitamin B12.