Insight | Waking at 3 a.m. is normal: what sleep experts do next

The Short Version

Brief night wakings are treated as an ordinary part of sleep by every expert in these conversations: Matt Walker says almost everyone surfaces at the end of a roughly 90-minute cycle, Gina Poe calls a mid-night bathroom trip absolutely normal, and Samer Hattar says waking at 3 or 4 a.m. is not a problem if you can fall back asleep [1][2][4][7]. What they concentrate on is the next few minutes: keep the lights very dim, leave the phone and tablet alone, do not look at the time, and use a quiet relaxation tool such as slow breathing, muscle relaxation or a practised self-hypnosis [5][6][7][8]. Their reasoning is that bright light, clock-checking and self-criticism each add alertness to a moment that would otherwise pass, and Poe describes worry about not sleeping as the very thing that keeps people awake [1][3][5][7][8]. They do not agree on everything, including how long awake is too long and whether to make up lost sleep the next day, and they say long or very frequent wakings deserve a medical look [1][4][8].

What They Said

A note on the sources first: [1] and [2] are the full and condensed versions of one Walker conversation, and [3] and [4] are the full and condensed versions of one Poe conversation, so the five voices here come from six conversations rather than eight [1][2][3][4].

Matt Walker: you wake every cycle and mostly forget it

Andrew Huberman put the question to Walker directly: many people wake three or four hours into the night, use the bathroom and fall back asleep, so is that a problem [1][2]? Walker first joked that Huberman should get your estate in order and then reassured him that it is perfectly normal, especially with age [1]. His explanation is that almost everyone briefly wakes at the end of a 90-minute sleep cycle to shift posture, and most people never remember doing it [1][2].

Walker gives the yardstick sleep scientists use. Sleep efficiency is the share of time in bed actually spent asleep, and 85% or more counts as healthy [1]. On his account that leaves room for a total of about 30 minutes awake spread across a night, a figure he gives for someone in bed around eight and a half hours [1][2].

He also says where normal ends. The warning signs are lying awake for 20 to 25 minutes or more, unable to get back to sleep, or waking consciously six to eight times a night [1][2]. Quality counts as much as quantity for him: you cannot be unimpaired on four hours of great sleep, and you cannot be unimpaired on eight hours of fragmented sleep either [1][2].

Walker is candid that his own earlier public messaging was too alarmist, and that this tone can make anxious sleepers worse [1]. He now tries to share the science without scaring people who already struggle [2]. Several of his practical tips are aimed at exactly the 3 a.m. moment. He wants every clock face out of the bedroom, the phone included, because knowing it is 3:22 a.m. only makes a hard night worse [1][2]. He and Huberman both note that worries at 3 or 4 a.m. feel far more catastrophic than the same concerns by day, and Huberman says he has learned not to place stock in them [1][2].

Two more Walker tools are about getting to sleep in general, and the summaries do not say they were tested on middle-of-the-night wakings. One is a worry journal written an hour or two before bed, which he likens to closing the emotional tabs on your browser and which, in the studies he cites, cut the time to fall asleep by 50% [1][2]. The other is replacing sheep-counting with a detailed mental walk: he cites work by Allison Harvey at Berkeley in which counting sheep made sleep harder while imagining a familiar, pleasant route helped [1][2].

Gina Poe: sleep is well regulated, so stop worrying

Poe, a UCLA professor of integrative biology and physiology, is the most relaxed of the group [3][4]. Asked by Huberman whether middle-of-the-night waking does any known harm, she answered that people should not worry about it, because "Sleep is really incredibly well homeostatically regulated" [4]. She went further: "It's absolutely normal to wake up at least once in the middle of the night to go to the bathroom" [4].

Her tolerance for time awake is wide. It is fine as long as you get back to sleep in a reasonable time, "or even if it takes you an hour", provided your lifestyle lets you make up that sleep the next morning or by going to bed a little earlier the next night [4]. What she does caution against is deliberately depriving yourself of sleep to do something rewarding and exciting, which she says is itself stressful for the body [4].

Poe names the mechanism behind sleep anxiety most plainly. She describes insomnia as a vicious cycle in which worrying about not sleeping keeps you awake, and her remedy is to tell yourself that your body will get the sleep it needs [3]. She applies the same calm to measurement. She wears a sleep tracker but says "I don't live my life by them", because the best ones are about 70% effective at staging sleep [4]. She also describes a paper from her lab in PNAS showing that deeper structures such as the hippocampus and thalamus can be in a different sleep state from the cortex that sleep labs measure, which may explain why some people with insomnia report not sleeping despite normal-looking lab results [3].

Her wind-down tools are about arriving at sleep calm: deep breathing, meditation, a warm bath or a comforting book, nothing too exciting and nothing too boring [3][4]. She adds that prayer can calm people for whom it fits their beliefs, and she passes on her mother's technique of tensing and relaxing the muscles from toes to head [3].

Andrew Huberman: a short list of tools, and no clock

Huberman is both the host of most of these conversations and a source in his own right. He says he tends to wake about once a night to use the bathroom, and he treats it as routine [4][6]. He has reduced it by sipping his last drink of the day slowly, on the idea that the urge to urinate depends on how fast you drink as well as how much [4].

When he wakes he keeps the lights as dim as possible [6]. If sleep does not return, he told a listener in a live question-and-answer session, "I have three different tools that I use" [5]. The first is long-exhale breathing; the second is relaxing the face, which tends to relax the jaw, followed by a progressive body relaxation; the third is a self-hypnosis recording for falling back asleep in the Reveri app, eight minutes long, which you practise in the daytime so it is ready at night [5]. In his solo sleep episode he says that hypnosis works for him "99 times out of 100" [6]. He points to free alternatives too: practising non-sleep deep rest (NSDR) or yoga nidra during the day, including his own free ten-minute NSDR script on YouTube [5][6]. Readers should know that the app was developed from research by his Stanford colleague David Spiegel, a former guest, and that it is a paid product [5][6].

His rules about what not to do are firm. On the time, he passes on what staff at the Stanford sleep clinic taught him: "people who look at the time when they wake up in the middle of the night Generally have a harder time falling back asleep" [5]. On the phone: "certainly don't get on your phone and start scrolling social media" [5]. He admits the tension in his own advice, since the hypnosis recording requires the phone to be present and avoiding the time is harder once you pick the phone up [5].

Huberman also offers a floor of reassurance for the worst case. If you simply cannot fall back asleep, he says, remember that "You can survive one night with minimal or no sleep" [5]. He warns against over-trusting sleep scores, describing studies in which people told they had slept poorly performed worse even after sleeping well, and the reverse [5]. In the Poe conversation he credits work by his Stanford colleague Alia Crum showing that daytime alertness follows the sleep score more than the sleep itself [3]. His advice is to look at averages and "be a scientist of yourself" [5].

Samer Hattar: the waking is fine, the bright light is the problem

Hattar is chief of the Section on Light and Circadian Rhythms at the National Institute of Mental Health and one of the scientists who discovered the light-sensing cells in the eye that set the body clock [7]. His comment on night waking is short and comes to us only through the summary. Waking at 3 or 4 a.m. to use the bathroom is not a problem if you can fall back asleep, he says, but turning on bright lights or reading a tablet can create an alerting signal [7]. He adds a possibility the others do not raise: some people who cannot fall back asleep may have clocks so misaligned that their night sleep is really more like a nap [7].

The rest of his contribution is about how little light a person needs at night. His experiment is to turn off some lights, sit for 10 to 15 minutes while your eyes adapt, and find "the minimum amount of light you require to see comfortably" [7]. He believes most people need about ten times less light at night than they use [7]. For screens, he says to dim them as far as possible, hold them away from your face, and minimise both intensity and duration [7]. Very dim red light, under 10 lux, does not disrupt sleep in his view [7].

Rebecca Robbins: take it in stride, and leave the bed if it turns into a fight

Rebecca Robbins, a sleep and circadian rhythm researcher at Brigham and Women's Hospital and Harvard Medical School, gives the most step-by-step account [8]. She does not treat a waking as a failure. A healthy sleeper, she says, takes about 15 to 20 minutes to fall asleep and about the same to drift back after waking [8].

For bathroom trips she recommends motion-activated night lights instead of a phone flashlight, and no checking of messages [8]. Then comes attitude: take the waking in stride, because beating yourself up spikes cortisol [8]. Go back to the last steps of your bedtime routine, such as progressive muscle relaxation or thinking of one good thing from the day [8].

Her distinctive advice covers the moment the calm fails. If the voice of "not again" shows up, get out of bed, because staying and tossing trains the brain to associate the bed with stress [8]. Sit on the floor or in a chair under a sleep-friendly bulb and breathe, read, or do a boring chore such as folding socks until you are sleepy [8]. She also asks people who think of themselves as bad sleepers to change that story and then try the full set of strategies seriously for about a week [8].

Where They Agree, and Where They Don't

The agreement is broad. All five treat a brief waking, especially a bathroom trip, as ordinary [1][4][6][7][8]. All of those who discuss the minutes afterwards agree on low light and no screens [5][6][7][8]. Walker and Huberman both say not to look at the time [1][5]. Walker, Poe, Huberman and Robbins all describe worry, self-criticism or bad news about your sleep as something that makes the night worse [1][3][5][8]. And all of them put behaviour ahead of pills: Walker says cognitive behavioural therapy for insomnia matches sleeping pills in the short term and beats them in the long term, Robbins says behavioural changes win out over medication over time in clinical trials, and Huberman's order is "behavioral tools first, then look to nutrition, then if necessary, look to supplementation" [1][6][8].

How long awake is still normal. This is the first of several real disagreements. Walker's warning sign is 20 to 25 minutes or more lying awake [1]. Robbins puts the healthy drift-back time at about 15 to 20 minutes [8]. Poe says not to worry even if it takes an hour, as long as you can make the sleep up [4]. The gap seems to follow from what each is watching for. Walker and Robbins are giving thresholds that separate ordinary sleep from possible insomnia [1][8]. Poe is talking about whether a single long waking harms you, and her answer rests on sleep being tightly regulated [4].

Whether to make up the lost sleep. Poe says to make it up the next morning or by going to bed a little earlier the next night [4]. Walker, following his colleague Michael Perlis, says to "do nothing" after a bad night: do not sleep in, do not nap, do not add caffeine and do not go to bed early, because each one either shrinks the window for sleep pressure to build or puts you in bed outside your natural sleep window [1][2]. Huberman lands in between, saying to wake at your usual time plus or minus an hour and take a short afternoon nap if needed [6]. Robbins allows sleeping in by no more than an hour on weekends and tells people struggling with insomnia to avoid naps so sleep pressure builds [8]. Hattar says sleeping in after a very late night is fine, since in his view the harm comes from patterns over weeks, though he was talking about staying out late, not about a broken night [7].

Stay in bed or get up. Robbins says to leave the bed once frustration starts [8]. Huberman's tools, the breathing, the body relaxation and the hypnosis recording, are all things he describes doing to fall back asleep where he is [5][6]. The summaries of Walker, Poe and Hattar do not record a view on this [1][3][7].

The phone. Walker wants it out of the bedroom as a clock face [1]. Robbins says not to use it even as a flashlight [8]. Hattar says a tablet at night is an alerting signal [7]. Huberman keeps a phone within reach for the hypnosis recording, with blue removed from the screen through a colour-filter shortcut he describes as different from the standard night mode [5].

Which light, and how dark. Huberman recommends red bulbs for rooms used at night and says red light lets someone who must be up in the night see without disrupting the healthy cortisol rhythm [5][6]. Hattar thinks the idea that blue light is uniquely bad has been oversold: the clock-setting cells respond across a wide range of wavelengths and also take input from rods and cones, so he says to cut total brightness [7]. The two are closer than they sound, because Huberman also says bright light of any colour will wake you, and Hattar accepts very dim red light [6][7]. Separately, Robbins wants the bedroom pitch black, while Hattar says he does not recommend total darkness, citing animals kept in constant darkness [7][8].

Melatonin. Huberman believes people who take melatonin often fall asleep readily and then wake later in the night, and that doses are too high and taken too often, which he labels as his opinion [5]. Walker cites a meta-analysis in which melatonin added only 3.9 minutes of sleep in healthy adults who are not elderly [1]. Hattar does not take it [7]. There is one factual conflict nearby: Walker says the pineal gland can calcify in older adults and flatten the nightly melatonin curve, while Hattar and Huberman agree that fears of pineal calcification are mostly an internet wellness myth [1][7].

Why It Works

The waking is built into the night. Sleep runs in cycles of roughly 90 minutes, and Walker says almost everyone wakes briefly at the end of a cycle to change position [1][2]. Poe adds that later cycles get shorter and are mostly stage two and REM sleep [4]. A waking three or four hours in is therefore something the structure of sleep produces [1][2].

Sleep corrects itself. Poe's reassurance rests on homeostatic regulation: the body tracks and defends its sleep [4]. Walker describes the same system through adenosine, which builds the longer you are awake and creates sleep pressure [1]. Hattar's model has three inputs for sleep: the circadian clock, the homeostatic drive, and direct input from the environment such as light and stress [7]. His point is that even with a good clock and strong sleep drive, light at the wrong time or stress can wreck sleep [7]. That third input is the one a person controls at 3 a.m. [7].

Light at night is read as daytime. Huberman says bright light viewed for 15 seconds or more between 10 p.m. and 4 a.m. can sharply suppress melatonin [5]. Hattar explains why our judgment fails here: the clock-setting cells measure brightness linearly and adapt very little, while conscious vision adapts so well that we are poor judges of intensity [7]. Huberman adds a timing effect. Bright light, exercise or caffeine in the two to four hours before your temperature minimum, the coldest point of your night, about two hours before your usual wake time, delays the clock, so someone who normally wakes at 7 a.m. and flips on bright lights at 3 or 4 a.m. will tend to want to sleep and wake later the next night [6]. Position matters as well: the clock-setting cells sit mainly in the bottom of the retina, which views the upper visual field, so overhead light is the most stimulating and low-set light the least [6].

Stress chemistry keeps you up. Robbins says self-criticism over a waking spikes cortisol [8]. Walker describes "wired and tired" insomnia, where a high drive to sleep is blocked by fight-or-flight activation and cortisol [1]. Poe's vicious cycle is the same idea in plain terms: the worry is the stimulant [3].

The bed becomes a cue. Robbins's reason for leaving the bed is conditioning: tossing teaches the brain to link the bed with stress [8]. Her reason for a fixed ritual is the reverse, that the brain learns what comes next when the same few steps are repeated [8].

What you believe about your sleep changes how you feel. The studies Huberman describes, in which people told they slept poorly performed worse even after sleeping well, suggest that the label does part of the damage [5]. Thinking is also unreliable at that hour. Huberman recalls a rule from graduate school all-nighters not to trust your thinking between 2:30 and 4 a.m. [5].

A caution on the evidence. The central claim of this article, that knowing wakings are normal shortens them, is supported by reasoning and clinical experience in these sources, not by a study any of them names that tested reassurance directly [1][3][8]. The clock-watching finding reaches us as something the Stanford sleep clinic taught Huberman, without a cited paper [5]. The worry-journal and mental-walk findings concern falling asleep at bedtime [1][2].

Where It Applies, and Where It Doesn't

The reassurance fits a specific picture: you wake once or a few times, perhaps for the bathroom, and you are asleep again within roughly 15 to 25 minutes [1][8]. Walker calls it normal especially with age [1].

It does not cover everything. Walker's red flags are 20 to 25 minutes or more awake, or six to eight conscious wakings a night [1]. Robbins's are regularly taking 30 to 40 minutes to fall asleep, waking every night unable to return to sleep, or still feeling unrested after a serious week of trying these habits, any of which may point to a sleep disorder that needs medical attention [8]. Poe says that consistently needing nine or more hours to function may signal inefficient sleep from problems such as sleep apnea, unnoticed snoring or frequent waking, or another illness, and that a sleep study may be worthwhile [3]. Huberman is blunt that sleep apnea is serious and linked to cardiovascular, sexual and cognitive problems [6]. If your nights match any of these descriptions, see a doctor or sleep specialist; this article is general information drawn from podcast conversations.

Poe's generous one-hour allowance carries a condition: a life that lets you make the sleep up [4]. Many people do not have that, and Robbins's advice for those with young children, shift work or caregiving duties is to protect whatever block of sleep they can and anchor it to a fixed wake time [8].

Some wakings have a removable cause, and then relaxation is treating the symptom. Walker says alcohol fragments sleep with many awakenings, partly by activating the fight-or-flight system, and that "sedation is not sleep" [1][2]. Robbins says alcohol disrupts sleep architecture so that people wake unrested even after long hours in bed [8]. Huberman lists fluids in the last couple of hours before bed and a very full stomach [5]. He says theanine gives some people dreams vivid enough to wake them, in which case the dose should be reduced or dropped [5][6]. Robbins says waking in a sweat or with chills can mean the bedroom temperature is wrong for you, and she suggests about 65 to 68 degrees Fahrenheit, cooler still during menopause [8]. Poe cites a National Sleep Foundation poll in which pets were the number one cause of nighttime waking, ahead of bathroom trips and children [3]. And Hattar's suggestion that a badly misaligned clock can turn night sleep into something like a nap points to a problem that morning light and regular timing address, which no 3 a.m. technique will [7].

People who must be up at night, for example to feed a baby, are a separate case. Huberman's suggestion for them is red light, which lets you see without disrupting the cortisol rhythm [6].

On supplements, Huberman says he adds 900 milligrams of myo-inositol on alternate nights and finds it much easier to fall back asleep after a waking, but this is his personal report, and he tells listeners to check with their doctor before adding or removing anything [5][6]. He also says supplements are not required [5]. Doses, products and app details here are as stated at the time of recording, so check current guidance before acting on them [5][6].

What To Do With It

1. Tell yourself the truth when you wake: this is normal. Almost everyone wakes at the end of a sleep cycle, and up to about 30 minutes awake across a night still counts as healthy sleep on Walker's figures [1][2].
2. Do not look at the time. Remove clock faces from the bedroom, or turn them away, and keep the phone out of reach or face down [1][2][5].
3. Keep bathroom light as low as you safely can. Use motion-activated night lights or a very dim red light, set low in the room and not overhead, and never the phone flashlight [6][7][8].
4. Do not check messages, scroll or read on a tablet [5][7][8].
5. Back in bed, run one calming routine: long-exhale breathing, then relax the face and jaw, then relax the body from the toes up [3][5][8].
6. Practise a fall-back-asleep script in the daytime so it is ready at night, whether a self-hypnosis recording, NSDR or yoga nidra; free versions exist [5][6].
7. Do not argue with 3 a.m. worries. They feel bigger at that hour than by day, so empty them onto paper an hour or two before bed, or onto note cards kept by the bed [1][2][8].
8. If frustration takes over, get out of bed. Sit somewhere dim, read or fold laundry until sleepy, then return [8].
9. Cut the causes you can: sip the last drink of the evening slowly, limit fluids in the final couple of hours, avoid a very full stomach and evening alcohol, and keep the room cool [1][4][5][8].
10. The next day, keep close to your usual wake time, as Walker, Huberman and Robbins advise (Poe is more relaxed about making the sleep up), and if wakings regularly run past 20 to 25 minutes or happen many times a night, talk to a doctor [1][4][6][8].

Sources

1. Dr. Matt Walker: The Science & Practice of Perfecting Your Sleep · Huberman Lab
2. Dr. Matt Walker on Perfecting Your Sleep: Sleep Stages, Caffeine, Alcohol, Supplements, Naps and Unconventional Tips · Huberman Lab
3. Dr. Gina Poe: Use Sleep to Enhance Learning, Memory & Emotional State · Huberman Lab
4. Dr. Gina Poe on How Each Stage of Sleep Shapes Learning, Memory, Creativity, and Emotional Recovery (Huberman Lab Essentials) · Huberman Lab
5. Summary Ama 14 2023 Philanthropy Evening Routine Light Therapy Health Metrics More · Huberman Lab
6. Sleep Toolkit: Tools for Optimizing Sleep & Sleep-Wake Timing · Huberman Lab
7. Dr. Samer Hattar on Timing Light, Food and Exercise for Better Sleep, Energy and Mood · Huberman Lab
8. How to Stop Waking Up Tired: Dr. Rebecca Robbins' Science-Backed Sleep Habits · The Mel Robbins Podcast