Sleep Hygiene Is the Least Useful Part of Sleep Treatment
No screens, no coffee after noon, cool dark room. You have done all of it and you are still awake at two. The research has an uncomfortable answer.
You stopped coffee after midday. You put the phone in the other room. The bedroom is cool, dark and quiet, there is lavender on the pillow, and you went to bed early to give yourself the best chance.
It is ten past two. You are lying there doing the arithmetic on how many hours are left if you fall asleep right now.
Here is the part nobody mentions. Almost everything on that list is the weakest ingredient in the treatment that actually works, and going to bed early is one of the things keeping you awake.
What the Trials Found When They Took It Apart
Cognitive behavioural therapy for insomnia, usually shortened to CBT-I, is the first-line treatment for chronic insomnia in Australian and international guidance, ahead of medication. It is a package of several techniques, and until recently nobody had separated out which parts were doing the work.
In 2024, Yuki Furukawa and colleagues published exactly that analysis in JAMA Psychiatry. They pooled 241 randomised trials covering 31,452 people and modelled each component separately.
The components that carried the effect were sleep restriction, stimulus control, cognitive restructuring, and third-wave elements such as acceptance and mindfulness. Sleep hygiene education came out as not essential. Relaxation training came out as possibly counterproductive.
That is the thing people are handed first, as a printed sheet, and the thing most people have already tried alone for years.
Sleep hygiene is not wrong. It is just not the medicine.
Why Early Nights Make It Worse
The mechanism comes from a model set out by Arthur Spielman and colleagues in the late 1980s, which still underpins the treatment. It separates what made you vulnerable, what set the insomnia off, and what keeps it going. The third one is the only one available to change, and it is usually the coping.
After a bad few weeks you start protecting your sleep. You go to bed at nine thirty to catch up. You lie in on Sunday. You stay in bed in the morning hoping for another half hour. Entirely reasonable, and it is the engine of chronic insomnia.
Sleep pressure builds with the hours you are awake. Spend ten hours in bed to get six hours of sleep and that six hours is spread thin across the night, broken into pieces, light at the edges. You have not gained sleep. You have diluted it.
Then there is the conditioning. In the early 1970s Richard Bootzin pointed out that a bed where you regularly lie awake, frustrated, planning and calculating, stops being a cue for sleep and becomes a cue for alertness. People notice this and misread it. They can fall asleep on the couch, or in a hotel, but not in their own bed. The bed itself has been trained.
What the Treatment Actually Asks You to Do
The two active behavioural parts are blunt, and they sound like the opposite of self-care.
Stimulus control: the bed is for sleep. If you are awake and frustrated, you get up, go to another room, do something quiet and dull in low light, and go back when you are sleepy rather than when you think you ought to be. Every time, including at three in the morning, including when it is cold.
Sleep restriction, better named bedtime restriction, is the counterintuitive one. You work out how much you are actually sleeping, then shrink your time in bed to roughly that, with a fixed wake time every day. Sleep becomes more compressed and more solid. As it consolidates, the window widens again, gradually.
It works by making you mildly sleep deprived on purpose for a week or two, which is precisely why it belongs in the cautions section below rather than in a list of tips.
How Well It Works
James Trauer and colleagues in Melbourne published a meta-analysis in Annals of Internal Medicine in 2015, pooling twenty randomised trials of face-to-face CBT-I. People fell asleep about nineteen minutes faster, spent about twenty-six minutes less awake during the night, and their sleep efficiency, the share of time in bed actually spent asleep, improved by around ten percentage points. The gains held at follow-up, and no adverse outcomes were reported.
Notice what did not change much: total sleep time. That is the honest picture. This is not a treatment that hands you extra hours. It is a treatment that stops you lying awake and dismantles the dread.
There is a second finding worth knowing, because it reverses the usual order. In 2017 Daniel Freeman and colleagues ran what was then the largest randomised trial of a psychological intervention, published in Lancet Psychiatry: 3,755 university students with insomnia, randomised to digital CBT-I or usual care. Sleep improved substantially. Paranoia and hallucinatory experiences also fell, and the analysis indicated the sleep improvement was what carried the change.
Sleep is usually treated as a symptom of the mental health problem. That trial is evidence it is also a cause of it.
Treating the sleep is not preparation for the real work. Quite often it is the real work.
Who Should Not Try This Alone
Bedtime restriction produces real daytime sleepiness in the first week or two. That matters, and it is why the honest version of this article includes a list of people who should do it with a clinician rather than from a blog.
- Anyone who drives, operates machinery, or does safety-critical work, because the first fortnight is genuinely drowsy
- Anyone with bipolar disorder, where sleep loss can trigger an episode
- Anyone with epilepsy, where sleep deprivation lowers the seizure threshold
- Anyone with suspected or untreated sleep apnoea, loud snoring, or witnessed pauses in breathing, which needs assessment first
- Shift workers and anyone whose schedule makes a fixed wake time impossible
- Anyone currently taking sleeping medication, where changes belong with the prescriber
If none of those apply, the pieces below are the ones with evidence behind them.
What Actually Helps
- Fix the wake time first, seven days a week. It is the single anchor the whole system hangs on, and it matters more than the bedtime
- Stop going to bed early to catch up. Go when you are sleepy, not when you are tired. They are different states, and only one of them leads to sleep
- Get out of bed when you are awake and wound up. Fifteen or twenty minutes is the usual guide, judged by feel rather than by watching the clock
- Keep the clock turned away. Arithmetic about remaining hours is arousal, not information
- Work on the daytime thoughts about sleep, not only the night. Cognitive restructuring was one of the strongest components in that 2024 analysis
- Let the hygiene rules go loose. They are hygiene in the literal sense, worth basic attention and not worth perfecting. Chasing them adds effort, and effort is the one thing sleep will not tolerate
Try it now · 30 seconds
Work out your real numbers for last night: roughly when you went to bed, when you got up, and how much of that you think you slept. Look at the gap between time in bed and time asleep. That gap, not the sleep, is what the treatment goes after.
A Realistic Expectation
People finish this treatment and still have bad nights. Travel, a hard week, a sick child, and it wobbles. What changes is that a bad night stops recruiting the next one, because you are no longer responding to it by spending longer in bed.
The other change people report is less about sleep than about the evening. The hours before bed stop being an anxious run-up to a test you might fail.
If you have been doing everything on the sleep hygiene list for a year and lying awake anyway, that is not a sign you are doing it badly. You have been using the weakest part of the treatment, on your own, for a problem that responds to the other parts.
None of this is a diagnosis, and it is not a substitute for individual assessment. If sleep has become something you dread, counselling can help with the part that keeps it running. Stabilise is available in Carlton, Melbourne and online.
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