# Do weighted blankets help you sleep?

> For some adults, possibly. In the best-known trial, 120 psychiatric patients reported far less insomnia under a heavy chain blanket than under a light one — but they could feel which one they had, and when trials are pooled the effect on insomnia is not clear. We could find no study behind the popular weight rule. Never use one for a baby, and never sleep under one you can’t easily push off.

Source: https://dreamsheeps.space/blog/weighted-blankets
Published: 2026-10-14 · Updated: 2026-10-14

## What do the trials show?

A weighted blanket is a heavy blanket — usually several kilos of chains, balls or husks inside the cover — meant to calm you with steady pressure, and one of the staples of [sleepmaxxing](https://dreamsheeps.space/blog/sleepmaxxing). Whether it helps you sleep depends on which trial you read. These are the main ones.

**The main randomised trials of weighted blankets and sleep, checked in October 2026**

| Trial | Who took part | What was compared | What it found |
| --- | --- | --- | --- |
| Ekholm and colleagues (2020), Sweden | 120 adults with insomnia and depression, bipolar disorder, generalised anxiety disorder or ADHD | A metal-chain blanket of 6 or 8 kg, or a light plastic-chain blanket of about 1.5 kg, for 4 weeks | Far less insomnia on a questionnaire under the heavy blanket, and less daytime fatigue, depression and anxiety; the benefit held over a year in those who kept using it |
| Kristiansen and colleagues (2024), Denmark | 45 outpatients with depression and insomnia | 2 weeks under a 7 kg ball blanket and 2 weeks under their own duvet, in random order | About 13 minutes more sleep a night on a wrist sensor and lower insomnia scores; no change in time to fall asleep or in waking |
| Yu and colleagues (2024), China | 102 adults with insomnia | A weighted blanket or an ordinary one, for a month | Bigger gains in sleep-quality scores with the weighted blanket; no significant difference in night-time waking on a wrist sensor |
| Gringras and colleagues (2014) | 67 autistic children aged 5 to 16 with severe sleep problems | 2 weeks under a weighted blanket and 2 under an identical-looking ordinary one | No difference in how long they slept, how fast they fell asleep or how often they woke — though children and parents preferred the weighted blanket |

Read together, they are mixed. The clearest results come from single trials in adults whose insomnia came with depression, anxiety or another psychiatric condition, and there is little for children’s sleep. When a 2024 meta-analysis pooled 8 randomised trials, 426 patients with mental disorders in all, it found a small reduction in anxiety; but for the 3 trials that measured insomnia, the difference was not statistically significant. Half the trials were at high risk of bias, mainly because participants could not be kept unaware of which blanket they had (Zhao and colleagues, 2024).

Professional bodies read the same evidence differently. The Royal College of Occupational Therapists, whose members prescribe the blankets, concluded in 2023 that “people like using weighted blankets but there’s limited evidence to show that they reduce anxiety, improve sleep and participation in daily life activities” (RCOT, 2023). A 2025 assessment for a Quebec health authority was more positive: the blanket “should improve sleep” at every age, it concluded (Grenier and colleagues, 2025).

## What did the Swedish trial show, and what can’t it?

It is the trial behind most of the headlines. Ekholm and colleagues recruited 120 patients of a psychiatric service in Stockholm who had insomnia alongside depression, bipolar disorder, generalised anxiety disorder or ADHD. Half were given a metal-chain blanket of 6 or 8 kg and half a light plastic-chain blanket of about 1.5 kg that looked the same. After 4 weeks, the heavy-blanket group’s insomnia scores had improved far more — a large effect — and they also stayed asleep better, were more active in the day, and reported less fatigue, depression and anxiety. No serious adverse events occurred, and in a year of open follow-up, those who kept a heavy blanket kept the benefit (Ekholm and colleagues, 2020).

What it can’t tell you is how much of that was the weight. Nobody could be blind to a blanket four or five times heavier than the other, and the main measure was a questionnaire, so expectation can’t be separated from pressure. It was a trial in people under psychiatric care, not in people having an ordinary bad night. And the year-long follow-up was open: only those who chose to carry on were followed.

## Do weighted blankets help with anxiety?

A little more of the evidence points this way than for sleep. The 2024 meta-analysis found a small reduction in anxiety across 5 trials in people with mental disorders (Zhao and colleagues, 2024), and the occupational therapists’ guide says the blankets “may help reduce anxiety” (RCOT, 2023).

If the anxiety is the kind that arrives at bedtime as a racing mind — tomorrow’s list, today’s conversation on repeat — a blanket may make lying there more comfortable, but it gives the thoughts nothing else to do. [Racing thoughts at night](https://dreamsheeps.space/racing-thoughts-at-night) covers what helps with that. Anxiety that is constant, or getting worse, is worth taking to a doctor in its own right.

## How is a weighted blanket supposed to work?

Through *deep pressure*: firm, even pressure across the body, like a long hug or being tucked in tightly. The idea comes from occupational therapy’s sensory-integration approach, in which heavy blankets and vests are used to calm people who struggle with what their senses take in (AETMIS, 2010). Even the occupational therapists’ own guide is careful about it: deep pressure is “thought to” lower the body’s levels of stress and arousal (RCOT, 2023).

The usual explanation of how that would help sleep is hormonal — less stress hormone, more oxytocin and melatonin. The one direct test we found was small. In 2023, 26 healthy young adults spent a night in a sleep laboratory under a blanket of about 12% of their body weight and another under one of about 2.4%. Under the heavy one, the rise in melatonin in the hour before lights out was about a third larger. Oxytocin, the stress hormone cortisol, a marker of the body’s alarm response, sleepiness and how long they slept did not differ (Meth and colleagues, 2023).

So the mechanism is plausible and barely tested. The plainest account may be comfort: in the children’s trial, children and their parents preferred the weighted blanket even though it made no measurable difference to their sleep (Gringras and colleagues, 2014). Liking how it feels is a perfectly good reason to use one. It is not evidence that it does more.

## How heavy should a weighted blanket be?

Light enough to push off easily, and no heavier than its maker’s maximum. The figure you will see everywhere, about 10% of your body weight, is a ceiling that manufacturers’ instructions usually give, as the Royal College of Occupational Therapists notes — a limit, not a target (RCOT, 2023).

We tried to trace it, and the furthest back we got was Quebec. A 2010 review for the province’s health-technology agency found the 10% limit in guidance for occupational therapists, and noted that the guidance did not explain where it came from. For weighted vests, the review traced the same figure to advice on the safe weight of a schoolchild’s backpack, and doubted that it carries over to something worn for longer, with its weight spread differently (AETMIS, 2010).

We found no study that compared different weights to see which works best for sleep (Europe PMC, searched October 2026). The trials simply used what their blankets weighed: 6 or 8 kg in Sweden, 7 kg in Denmark, about 12% of body weight in the 2023 laboratory study. So choose one you can lift off yourself, easily, while half asleep. If it pins you down, it is too heavy, whatever the label says.

## Who shouldn’t use a weighted blanket?

- *Babies.* The American Academy of Pediatrics advises against weighted blankets, sleepers, swaddles or any other weighted object on or near a sleeping baby, in its guidance for the first year of life (American Academy of Pediatrics, 2026).
- *Children who can’t get out from under it easily by themselves.* In Quebec in 2008, a 9-year-old autistic boy died after being held under a weighted blanket of nearly 18 kg — about three-quarters of his body weight — at his specialised school. The coroner’s rules that followed make a good checklist for any child: a health professional should confirm the blanket is suitable; its weight should match the child’s build; the head must never be covered; a child must never be rolled up in one or left alone under it; and they must always be able to get out easily (AETMIS, 2010).
- *Anyone who can’t easily take it off themselves*, because of illness, disability, frailty, or a medicine or condition that makes them drowsy. Before prescribing one, occupational therapists are asked to check exactly this, along with any condition that affects breathing, the ability to control body temperature, or the skin (RCOT, 2023).
- *People with breathing, heart or circulation problems, or epilepsy*, who should ask a doctor first. With very low muscle tone and skin problems, these were the contraindications listed in Quebec’s review (AETMIS, 2010).
- *Anyone who snores heavily or may have sleep apnoea.* In one small study with no comparison group, 26 adults with insomnia slept for 10 nights under blankets of about 10% of their body weight; their overnight recordings afterwards showed more obstructive apnoeas and hypopnoeas than before, and the authors advise screening for sleep apnoea (Benbir Şenel and Karadeniz, 2024).

For prescribed use, the occupational therapists’ guide adds one more precaution: if a weighted blanket is used at night, it shouldn’t hang over the sides of the bed, and it should be taken off once the person is asleep (RCOT, 2023).

## Do weighted blankets make you too hot?

They can. Falling asleep depends on the body losing heat: core temperature drops as sleep begins, and warm hands and feet are how the heat gets out ([you have to cool down first](https://dreamsheeps.space/learn/cool-down-first)). A dense blanket holds heat in, and heat and heaviness are among the minor complaints reported in older people who use them (Grenier and colleagues, 2025).

If you run hot, keep the room cool and think of the blanket as something for the start of the night — which is what the occupational therapists’ advice to take it off once asleep amounts to anyway.

## When is it more than a sleep problem?

If poor sleep happens most nights, has gone on for months and is affecting your days, take it to a doctor rather than to a shop. The recommended first treatment for chronic insomnia is cognitive behavioural therapy for insomnia, CBT-I (Edinger and colleagues, 2021). A blanket can sit alongside that; it is no substitute for it. The rest of a good evening — light, timing, a wind-down — is in [the bedtime routine guide](https://dreamsheeps.space/bedtime-routine).

## Sources

1. [Ekholm, Spulber & Adler (2020) — A randomized controlled study of weighted chain blankets for insomnia in psychiatric disorders. Journal of Clinical Sleep Medicine 16(9), 1567–1577](https://doi.org/10.5664/jcsm.8636)
2. [Kristiansen, Videbech, Speed, Dionysopoulos, Bjerrum & Larsen (2024) — The efficacy of ball blankets on insomnia in depression in outpatient clinics: a randomised crossover multicentre trial. Journal of Sleep Research 33(6), e14238](https://doi.org/10.1111/jsr.14238)
3. [Yu et al. (2024) — Effect of weighted blankets on sleep quality among adults with insomnia: a pilot randomized controlled trial. BMC Psychiatry 24(1), 765](https://doi.org/10.1186/s12888-024-06218-9)
4. [Gringras et al. (2014) — Weighted blankets and sleep in autistic children: a randomized controlled trial. Pediatrics 134(2), 298–306](https://doi.org/10.1542/peds.2013-4285)
5. [Zhao, Zhang, Liu, Zhao & Zhu (2024) — Safety and effectiveness of weighted blankets for symptom management in patients with mental disorders: a systematic review and meta-analysis of randomized controlled trials. Complementary Therapies in Medicine 87, 103104](https://doi.org/10.1016/j.ctim.2024.103104)
6. [Royal College of Occupational Therapists — Weighted blankets for children and adults: a guide for occupational therapists (January 2023)](https://www.rcot.co.uk/media/649/download)
7. [Grenier, Lawani, Caron & St-Jacques (2025) — Therapeutic use of blankets, vests and other weighted objects with different clienteles: executive summary. UETMISSS, CIUSSS de la Capitale-Nationale, Québec](https://www.ciusss-capitalenationale.gouv.qc.ca/sites/d8/files/docs/MissionUniversitaire/Publications/Sommaire-executif-anglais_CVO-lestes.pdf)
8. [AETMIS, Québec (Beauchamp, 2010) — Couvertures et vestes lestées : sécurité, efficacité et enjeux de leur utilisation dans différents cadres d’intervention, with an English summary (Weighted blankets and vests: safety, efficacy and issues related to their use in different intervention settings). ETMIS 6(5)](https://www.inesss.qc.ca/fileadmin/doc/AETMIS/Rapports/ServicesSociaux/ETMIS2010_Vol6_No5.pdf)
9. [Meth et al. (2023) — A weighted blanket increases pre-sleep salivary concentrations of melatonin in young, healthy adults. Journal of Sleep Research 32(2), e13743](https://doi.org/10.1111/jsr.13743)
10. [American Academy of Pediatrics, HealthyChildren.org — How to keep your sleeping baby safe: AAP policy explained (last updated 11 September 2026)](https://www.healthychildren.org/English/ages-stages/baby/sleep/Pages/a-parents-guide-to-safe-sleep.aspx)
11. [Benbir Şenel & Karadeniz (2024) — Interim analysis of a prospective polysomnographic study of weighted blankets in patients with psychophysiological insomnia. Psychiatry and Clinical Psychopharmacology 34(4), 365–370](https://doi.org/10.5152/pcp.2024.23795)
12. [Edinger et al. (2021) — Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. Journal of Clinical Sleep Medicine 17(2), 255–262](https://doi.org/10.5664/jcsm.8986)

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