Guide · Sleep
A wind-down that helps — and where it stops.
Most sleep advice is a list of habits with no sense of proportion: it treats “keep your room cool” and “you may have a treatable disorder” as if they were the same size of problem. This guide separates them.
What a wind-down is actually for
A wind-down routine does one job well: it moves you from the state you are in during the day to the state sleep needs, and it does it on a schedule your body can learn. That is genuinely worth having. Most people sleep better with one than without.
What it is not is a treatment. And that distinction is not a technicality or an abundance of caution — it is the explicit finding of the clinical guideline that covers this.
The finding most sleep advice leaves out
The American Academy of Sleep Medicine’s clinical practice guideline on chronic insomnia says that sleep hygiene should not be used as a single-component treatment for chronic insomnia in adults. Its lead author put it plainly: those recommendations “do not constitute an effective stand-alone therapy”.[1]
The same guideline gives its one strong recommendation to cognitive behavioural therapy for insomnia — CBT-I — and conditionally recommends stimulus control, sleep restriction and relaxation therapy as single components.[1] The NIH’s heart and lung institute says the same thing more briefly: CBT-I “is usually recommended as the first treatment option for long-term insomnia”.[2]
So: a wind-down is a good habit for a normal sleeper. If your sleep has been bad for weeks, it is the wrong tool, and no amount of doing it better will make it the right one.
The parts with the strongest support
A consistent wake time, more than a consistent bedtime
Your body clock takes its cue from when light hits your eyes in the morning, not from when you switched the lamp off. A wake time that moves by three hours at the weekend is a bigger disruption than a bedtime that drifts by forty minutes. If you change one thing, change that one.
The bed is for sleeping
This is the idea behind stimulus control, one of the components the guideline conditionally recommends on its own.[1] The principle: if you lie awake in bed for long stretches, your brain learns that bed is a place where you are awake and frustrated. Getting up, going somewhere else, and returning when you are actually sleepy breaks that association.
It feels counterproductive the first few times. It is not a relaxation technique — it is retraining what the bed means.
Dark, cool, quiet — and boring
The environment advice is real but modest: a dark, cool, quiet room helps most people fall asleep and stay asleep.[2] Treat it as removing obstacles rather than as a lever. If your room is already dark and cool, making it darker and cooler is not the thing standing between you and sleep.
Caffeine earlier than you think, alcohol later than you think
Caffeine has a long tail — an afternoon coffee is still working at bedtime for many people. Alcohol is the one that fools people: it shortens the time to fall asleep and then fragments the second half of the night, so it feels like it helps and measurably does not.[2]
The advice that is weaker than it sounds
Screens before bed are the usual headline, and the evidence is softer than the confidence with which it is repeated. What is well supported is that being alert and engaged before bed makes sleep harder — and a phone is very good at making you alert and engaged. The screen is a proxy for the thing that matters. A dull book on a bright screen is likely fine; an argument on a dim one is not.
Chasing a perfect routine is its own trap. If a wind-down becomes another thing to get right, it has started working against you.
How much sleep, really
The joint consensus of the American Academy of Sleep Medicine and the Sleep Research Society is that adults should sleep seven or more hours a night on a regular basis for optimal health.[3] It is a floor, not a target, and it is a population statement rather than a prescription for your particular night.
Where this stops and something else starts
See a healthcare professional if you have had difficulty falling or staying asleep at least three nights a week for three months or more, or if poor sleep is affecting how you function during the day — whatever your routine looks like.
That is not a disclaimer to skim past. Chronic insomnia has a first-line treatment with strong evidence behind it,[1][2] and it is not a better bedtime routine. Getting the right help is faster than perfecting the wrong tool.
If sleep is disturbed alongside low mood, heavy snoring or breathing pauses, or a medicine you have started, mention those too — they change the answer.
What HealthApp does here, and what it does not
HealthApp gives you a wind-down you shape yourself, a one-minute breathing reset on the wrist, and a record of what your nights actually looked like — read from Apple Health rather than guessed at.
It is not CBT-I, it does not diagnose anything, and it is not a medical device. It is a good tool for the first half of this page and the wrong tool for the second half. We would rather say so here than have you find out slowly.
Sources
- AASM clinical practice guideline on chronic insomnia (2021)Edinger JD, Arnedt JT, Bertisch SM, et al. Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. Journal of Clinical Sleep Medicine, 2021;17(2):255–262. Published online December 2020. Read the source →
- NHLBI (NIH) guidance on insomnia treatmentNational Heart, Lung, and Blood Institute, National Institutes of Health. Insomnia — Treatment. Read the source →
- AASM and SRS joint consensus on sleep duration (2015)Watson NF, Badr MS, Belenky G, et al. Recommended amount of sleep for a healthy adult: a joint consensus statement of the American Academy of Sleep Medicine and Sleep Research Society. 2015. Read the source →
Every claim above links to the primary guidance it comes from. Where the evidence is softer than the popular version, this guide says so rather than borrowing the confidence. Sources we could not read in full are not cited.
Rest that lights the sky.
A wind-down you shape, a record you can trust, and an honest line about where an app stops being the right help.