The evidence on adjustable beds is about sleep apnea scores, not snoring. What exists is head-of-bed elevation measured in people with obstructive sleep apnea. A 7.5 degree rise cut the median apnea-hypopnea index from 15.7 to 10.7 events per hour in 52 patients. A 30 degree rise took the average from 23.8 to 17.7 in 45 patients, and from 25.7 to 17.8 in a multicenter study of 30 patients, where half were responders. In a pilot randomized trial of 23 people on a real adjustable bed at 7.5 degrees, apnea scores differed from a flat bed with no added discomfort. The studies are small, mostly in apnea, and say nothing certain about plain snoring.
Mattress shops sell the idea in one line: raise the head, ease the airway, snore less. Is there anything behind it? There is some research, and it is more interesting than the sales pages, but it answers a slightly different question from the one people are asking.
No controlled study of snoring on an adjustable bed is available. What exists is head-of-bed elevation, measured with sleep studies, in people who have obstructive sleep apnea. This article goes through it.
What the studies on adjustable beds and snoring measured
The common thread in the research is the apnea-hypopnea index, the number of breathing stops and shallow breaths per hour. Snoring is a related but separate thing: it can happen with or without apnea. So when you read results below, keep in mind that they come from patients with sleep apnea, and that "improvement" means a lower index, not necessarily a quieter night.
That caveat matters, and the studies are still informative. Snoring and obstruction share a cause, a narrowed airway, and an intervention that widens the airway in apnea patients is a reasonable candidate for snorers. It is a candidate, not a result.
A mild rise: 7.5 degrees
In Brazil, researchers tested a mild head-of-bed elevation of 7.5 degrees in 52 patients with obstructive sleep apnea. Each had a baseline sleep study and a second one with the elevation. Compared with baseline, the median apnea-hypopnea index fell from 15.7 (interquartile range 11.3 to 22.5) to 10.7 (6.6 to 16.5) events per hour. The authors said it improved apnea severity without interfering with sleep architecture, and called it a simple alternative treatment to ameliorate it. The patients averaged 53 years and a body mass index of 29.6.
Souza FJFB, Genta PR, de Souza Filho AJ, Wellman A, Lorenzi-Filho G. The influence of head-of-bed elevation in patients with obstructive sleep apnea. Sleep Breath 2017. PMID 28647854
A bigger rise: 30 degrees of head and trunk
Two studies used 30 degrees. In one, 45 patients had both a sleep study and an endoscopic look at the airway under sedation, flat and with the head and trunk raised. The velum (soft palate) and the side walls of the throat collapsed less at 30 degrees. The base of the tongue and the epiglottis did not change significantly. On the sleep study, the average apnea-hypopnea index fell from 23.8 to 17.7 events per hour (p = 0.03), and the percentage of apneas fell from 55 to 44.
Iannella G, Cammaroto G, Meccariello G, Cannavicci A, Gobbi R, Lechien JR, Calvo-Henríquez C, Bahgat A, Di Prinzio G, Cerritelli L, Maniaci A, Cocuzza S, Polimeni A, Magliulo G, Greco A, de Vincentiis M, Ralli M, Pace A, Polimeni R, Lo Re F, Morciano L, Moffa A, Casale M, Vicini C. Head-Of-Bed Elevation (HOBE) for Improving Positional Obstructive Sleep Apnea (POSA): An Experimental Study. J Clin Med 2022. PMID 36233488
The second was a multicenter observational study that compared 30 patients with sleep apnea with 30 healthy controls, each recorded supine, at 30 degrees and on the side. In the patients, the apnea-hypopnea index fell from 25.7 to 17.8 events per hour with the head raised, a mean reduction of 31%. Half of the patients were responders, meaning their index dropped by 50% or more, and their odds of responding were four times those of the controls. The authors found raised expiratory nasal resistance in the patients as well, and described elevation as low-cost, well-tolerated positional therapy for selected positional phenotypes.
Maniaci A, Lentini M, Lechien JR, Iannella G, Casale M, Moffa A, Pelucchi S, Caranti A, Pang KP, Rotenberg B, Vicini C. Head-of-bed elevation outcomes on apnea severity nasal resistance in obstructive sleep apnea: a multicenter observational study. Sleep Breath 2025. PMID 41249724
A third group measured the airway itself. In 61 adults with moderate-to-severe sleep apnea who could not tolerate CPAP, a camera exam under sedation with the head of the bed raised to 30 degrees found lower airway opening pressures at all four sites of the upper airway than when the bed was level. The standard scoring of the pattern of collapse did not change. Most of the group had a positional form of apnea, with a supine index of 48.7 events per hour against 20.8 off the back.
Owen GS, Talati VM, Zhang Y, LoSavio PS, Hutz MJ. The effect of head of bed elevation on upper airway collapsibility during drug-induced sleep endoscopy. J Clin Sleep Med 2024. PMID 37707285
The one trial on an actual adjustable bed
Most of the above is done with wedges or tilted hospital beds. A pilot randomized trial in Korea tested a mild 7.5 degree elevation on a true adjustable bed in daily life. It enrolled 32 people with sleep disturbance, 23 completed it, and they were randomized to a flat bed or a mildly raised one for the follow-up sleep study. There was no difference in adverse events or in sleep satisfaction between the groups, and the changes in the respiratory distress index and the apnea-hypopnea index did differ significantly. The authors read it as showing that a mild rise is feasible at home and can be an alternative for obstructive sleep apnea. It is a pilot, with few participants, and no snoring outcome is reported.
Lee S, Park JH, Kim JY, Park SW, Shin HB, Kim BH. Implementation of Head of Bed Elevation Using Adjustable Bed and Its Effects on Sleep: A Pilot Randomized Trial. Altern Ther Health Med 2025. PMID 38758150
Why it may work for some people and not for others
The airway study suggests a mechanism and a limit. Raising the upper body reduced collapse of the soft palate area and the side walls of the throat, but not the tongue base or epiglottis. If your snoring comes from the back of the tongue falling toward the throat, a raised head may do little. If it comes mainly from the soft palate, or from nasal congestion that gets worse when you lie flat, it may help more. The multicenter study's finding that nasal resistance was raised in apnea patients is a hint in the same direction, but nobody has shown which kind of snorer benefits.
It also explains why position matters: some people's apnea is mostly on the back (more: Best position to sleep in for sleep apnea). A raised head is a version of positional therapy.
Beds that react to snoring on their own
A product category exists in which the bed listens, detects snoring and raises the head automatically. Its effect on snoring is not established. If you are shopping, treat the feature as unproven, and note that the studies above manually set a fixed angle.
An adjustable base is expensive next to a wedge pillow, and the research does not say whether a wedge pillow or a bed riser gives the same effect, so a trial of a pillow or blocks under the head of the bed costs less to try than a new bed.
What the studies leave open
It helps to list the gaps, because they are most of the story. No study counted snoring on an adjustable bed. None compared a wedge pillow with an adjustable base. None followed people for long enough to say whether the effect holds after months, or whether people keep sleeping that way. None identified in advance who benefits, beyond the hint that positional apnea and soft palate collapse respond better than tongue-base collapse. And the apnea studies are in people with a diagnosis, who are not the same as someone who snores and has never been tested.
That does not make a raised head a bad idea. It makes it an experiment you run on yourself, with the numbers to judge it.
How to test a raised head with your own recordings
The sensible way to judge an adjustable bed for snoring is to measure before you spend. Record three ordinary nights flat, with the phone set up as the app advises, and note the alcohol and nose state. Then raise the head, with a wedge or on a bed that adjusts, and record three more nights. Compare how long you snore and how loud, and listen to a few clips from each set. A snore recorder app explains how to keep the test fair, and How to stop snoring ranks the other options by evidence.
SleepTrace listens through the phone's microphone, marks snoring episodes with a loudness reading and keeps clips you can play back (the free plan plays back 3 clips a month, Premium has no limit). It does not know the bed's angle, so write it down. It is not a medical device.
Loud snoring with pauses, gasping, morning headaches or heavy daytime sleepiness should be assessed by a doctor, not managed with a bed. The apnea studies above were done in patients with a diagnosis and a sleep study. An adjustable bed does not replace either.
Frequently asked questions
No controlled trial has shown that. The evidence is for sleep apnea scores: raising the head of the bed by 7.5 degrees lowered the median apnea-hypopnea index from 15.7 to 10.7 events per hour in 52 patients, and a 30 degree rise lowered the average from 23.8 to 17.7 in 45 patients. Whether that carries over to plain snoring is not shown.
No study has tested angles for snoring itself. The apnea studies used 7.5 degrees (a mild rise, which a pilot trial tested on a real adjustable bed) and 30 degrees of head and trunk. Because you can only learn what helps you from your own nights, the sensible approach is to compare recorded nights flat and raised, one setting at a time.
No study compares the two, so there is no evidence either way. A wedge raises the upper body in a fixed way; an adjustable base lets you change the angle. Which gives a better night is a matter of comfort and your own recordings.
In a study that watched the airway with a camera under sedation, a 30 degree rise reduced collapse of the soft palate area and the side walls of the throat but not at the base of the tongue or the epiglottis. If your snoring comes mainly from the tongue base, a raised head may do less. Nasal congestion, weight and alcohol are separate drivers.
Not on its own, as far as these studies go. They report lower apnea-hypopnea scores on average, but most people stayed above normal and the samples are small. Sleep apnea needs a doctor's assessment and a proper sleep test.
SleepTrace is a wellness app, not a medical device. This article is general information, not medical advice. If your symptoms are frequent, severe or worrying, please talk to a doctor.
The studies measure apnea scores, not snoring, so the only proof that counts is your own bedroom. Record a few nights flat and a few with the head raised, then compare how much snoring SleepTrace marked. It hears sound only and cannot tell your position or the angle of the bed.
Hear your own night. SleepTrace turns a night of audio into your sleep phases, the sounds you made, and how it all trends. Works without a wearable, better with one. Your phone on the nightstand is enough to start. Get it for iPhone or Android →