3 High Impact Sleep Concepts High Performers Take Seriously
(your sleep apps can’t measure these.)
6 min. read | Sleep
Your sleep app tracks hours and stages - but misses these three factors that point to sleep quality and how sleep helps our waking life. A certified hypnotist breaks down the science around hypnagogic & hypnopompic states, the glymphatic system, and hyperarousal through the lens of hypnosis for better sleep.
If you can't get a solid night's sleep and it's become a pattern, there are two things to know before you try anything else.
First: however immovable it feels, there is nothing wrong with you. This pattern can change (trust me!).
(If you haven't had a medical workup for chronic sleep issues, that's always worth doing - and hypnosis works beautifully alongside whatever your doctor recommends.)
Second: most people have heard about sleep hygiene - limiting screen time in the evening, adjusting the bedroom environment, keeping a consistent wake time, avoiding caffeine after noon, winding down with a routine. All of that helps, and it's actually important.
But when you're doing all of it and you still can't sleep through the night or get a solid seven to nine hours - when you're lucky to get three or four, and you've still got to function as a full-time parent, boss, employee, partner, human - it starts to feel extremely discouraging, to say the least.
There's plenty of good advice out there about screens and caffeine and consistent wake times - all of that sleep hygiene advice definitely has its place.
But what I want to do here is share three fascinating sleep concepts that I think are worth knowing about because of how they've upgraded my understanding of sleep and it’s impact on our waking life - and because some of the most useful things the research has turned up in the last twenty years don't get much airtime outside of specialist circles.
Each one also happens to connect directly to the work I do, with some very interesting overlap.
Sleep Concept #1: The Hypnagogic & Hypnopompic States
Your brain's most reprogrammable, highly receptive window opens twice daily (and most people literally scroll right past it).
The threshold between waking and sleep where the brain becomes naturally receptive is called the hypnagogic state. The same window on the way out - that hazy edge between sleep and waking - is the hypnopompic state. Most people pass through both unconsciously every night.
Learning to use either one intentionally is one of the most direct routes to subconscious change available to you - and you're already there twice a day.
Thomas Edison knew something about this without the neuroscience to name it. He's said to have napped in a chair holding steel balls in his hands, so that the moment he drifted into the hypnagogic state and his muscles relaxed, the balls would drop and wake him - and he'd immediately record whatever imagery or idea had surfaced. Salvador Dalí used the same trick with a heavy key and a metal plate. Einstein reportedly did something similar.
For a long time these were just colorful anecdotes. Then, in 2021, a team at the Paris Brain Institute led by Delphine Oudiette actually tested it. They brought 103 volunteers into a sleep lab, had them try a creative math problem, then let them doze off holding a plastic cup - Edison's technique in modern times. Participants who spent even fifteen seconds in that earliest sleep stage tripled their rate of solving the problem compared to those who stayed awake (findings were published in Science Advances). It turns out Edison was onto something.
What Edison was doing intuitively, contemporary researchers now describe as harvesting the brain's most associative, least filtered processing window. The hypnogogic state is a measurable shift in brainwave activity from the beta-dominant waking state down through alpha and into the theta range, precisely the range associated with hypnotic receptivity. The hypnopompic state on the way out operates by similar principles - the prefrontal cortex hasn't yet fully reengaged its critical functions, which means the subconscious is still unusually accessible.
Sleep Concept #2: The Glymphatic System
Your brain runs a vital cleaning cycle during deep sleep only (and whether it runs regularly has long-term consequences).
The discovery came in 2013 from a team at the University of Rochester Medical Center led by Danish neuroscientist Maiken Nedergaard, and it surprised the whole field. The brain has its own dedicated waste-clearance system, and it runs primarily during sleep.
Hypnosis has been shown to deepen sleep architecture, giving that glymphatic system the time it needs to do its vital job.
Using real-time imaging in live mice, the researchers found that during sleep, astrocytes - the brain's primary support cells - contract, opening the space between brain cells by roughly 60% and allowing cerebrospinal fluid to flood through and flush out the metabolic waste that accumulates during waking hours. Among it: beta-amyloid and tau proteins, the same proteins that aggregate in Alzheimer's disease. The interstitial space goes from roughly 14% of brain volume when awake to 23% when asleep - and that difference is the cleaning cycle either running or not running.
The implications landed hard enough that Matthew Walker devoted significant attention to it in his 2017 book Why We Sleep, framing chronic sleep deprivation not just as a performance issue but as a long-term neurological risk.
What makes this especially relevant for people who struggle with sleep quality rather than quantity is that this clearance system is disproportionately active during slow-wave sleep - not during lighter sleep stages, and not during REM. Seven hours of fragmented, shallow sleep does not deliver the same clearance as six hours of deep, consolidated sleep. More than just rest, deep sleep is cleaning house - and if a nervous system threat signal is consistently pulling you out of slow-wave sleep before the job is done, the fogginess you feel the next day has an important biological mechanism behind it.
Sleep Concept #3: Hyperarousal
Subconscious loose ends can become threat signals that keep your nervous system alert at bedtime (and no amount of sleep hygiene fixes this).
The model that best explains this was developed by sleep researcher Arthur Spielman in the late 1980s and remains one of the most clinically durable frameworks in sleep medicine. It's known as the 3P model, and it identifies three layers of chronic insomnia: predisposing factors (traits and vulnerabilities you bring into the equation), precipitating events (the stressor that kicks it off), and perpetuating behaviors (what keeps it running long after the original trigger is gone).
This is a subconscious program that hypnosis was made to update - because when you resolve those threat signals at the source, you get to sleep through the night and wake feeling restored, like you actually slept.
What Spielman observed - and what decades of subsequent research has confirmed - is that the nervous system can learn to treat the bed itself as a threat cue. Researchers call this conditioned arousal.
A 2001 study by Michael Perlis at the University of Rochester used quantitative EEG to demonstrate that chronic insomnia patients show measurably elevated high-frequency brain activity at sleep onset and during non-REM sleep. That's the neurological signature of a nervous system that won't down-regulate.
This is hyperarousal - a baseline elevation of the nervous system's threat-detection threshold that persists even when the original precipitating stressor is long gone. It's distinct from the everyday experience of anxiety, which is part of why it's so hard to resolve with approaches aimed at anxiety itself.
Allison Harvey at Oxford added another layer with her 2002 cognitive model of insomnia, which has since been cited over 300 times. She showed that the monitoring behavior insomniacs engage in - clock-checking, body-scanning, mentally calculating how many hours of sleep remain - actively perpetuates the arousal it's trying to resolve.
The cruel irony the research keeps confirming is that trying harder to sleep makes the nervous system more alert. What none of it addresses is why the nervous system keeps re-running those threat signals in the first place.
So Then What?
When the nervous system is running a background threat signal, even the pressure of knowing how much you need sleep can't override it. That's why you can be completely exhausted and still not be able to fall asleep - and sleep apps just don't go here.
There's a lot of really great advice out there, and most of it works at the habitual level, the conceptual level, maybe the neurophysiological level.
Hypnosis actually updates the subconscious programs that are keeping your mind running, and resolves the nervous system threat signals that are keeping your body from doing what it already knows how to do.
Is your nervous system working the night shift when you need to get some sleep? Ready to sleep through the night and wake feeling like you actually slept?
If you're not getting the rest you need, I'd love to meet and talk about how hypnosis can help.
Visit higherstatehypnosis.com/schedule to set up some time for us to connecton Zoom.
I look forward to meeting you!
Frequently Asked Questions
What is the hypnagogic state? The hypnagogic state is the transitional window between wakefulness and sleep where the brain shifts from beta-dominant activity into alpha and theta wave ranges. It's one of the most receptive states the mind reaches - associated with heightened subconscious access and, according to research published in Science Advances (2021), a measurable boost in creative problem-solving.
What is the glymphatic system? The glymphatic system is the brain's dedicated waste-clearance pathway, discovered by Maiken Nedergaard's team at the University of Rochester in 2013. During sleep, astrocytes - the brain's primary support cells - contract, opening the interstitial space by roughly 60% and allowing cerebrospinal fluid to flush out metabolic byproducts, including beta-amyloid proteins linked to Alzheimer's disease.
What is hyperarousal in sleep? Hyperarousal is a sustained elevation of the nervous system's threat-detection threshold that prevents normal sleep onset and maintenance. Unlike general anxiety, it's a conditioned state - the nervous system has learned to stay alert at bedtime, often long after the original stressor is gone. EEG research by Michael Perlis (University of Rochester, 2001) shows it as measurably elevated high-frequency brain activity during sleep.
Can hypnosis help with sleep problems? Yes. A 2014 study by Cordi, Schlarb, and Rasch at the University of Zurich found that hypnotic suggestions before sleep increased slow-wave sleep by 81% in highly suggestible subjects. Hypnosis also addresses hyperarousal at the subconscious level - resolving the stored nervous system threat signals that conventional sleep hygiene cannot reach.
Why can't I sleep even when I'm exhausted? Exhaustion and the nervous system's alertness signal are two separate systems. Hyperarousal - a conditioned state where the nervous system stays alert at bedtime - can override physical fatigue entirely. Sleep researcher Arthur Spielman's 3P model identifies this as a perpetuating factor that persists long after the original cause of insomnia has resolved.
Citations
Stickgold, R. (2005). Sleep-dependent memory consolidation. Nature, 437(7063), 1272–1278.
Stickgold, R., Malia, A., Maguire, D., Roddenberry, D., & O'Connor, M. (2000). Replaying the game: Hypnagogic images in normals and amnesics. Science, 290(5490), 350–353.
Lacaux, C. et al. (2021). Sleep onset is a creative sweet spot. Science Advances, 7(50).
Xie, L. et al. (2013). Sleep drives metabolite clearance from the adult brain. Science, 342(6156), 373–377.
Walker, M. (2017). Why We Sleep. Scribner.
Cordi, M.J., Schlarb, A.A., & Rasch, B. (2014). Deepening sleep by hypnotic suggestion. Sleep, 37(6), 1143–1152.
Spielman, A.J., Caruso, L.S., & Glovinsky, P.B. (1987). A behavioral perspective on insomnia treatment. Psychiatric Clinics of North America, 10(4), 541–553.
Perlis, M.L. et al. (2001). Beta/Gamma EEG activity in patients with primary and secondary insomnia. Sleep, 24(1), 110–117.
Harvey, A.G. (2002). A cognitive model of insomnia. Behaviour Research and Therapy, 40(8), 869–893.
