By Professor Vik Veer, Consultant ENT Surgeon, Royal National ENT Hospital & Queens Hospital, London - updated 21.5.2026
The Short Answer
The best sleeping position for snoring and sleep apnoea is the recovery position: lying on your side with your face angled slightly downward, your top knee bent for stability, and your neck gently extended rather than flexed. This is not simply clinical opinion. It is what I observe every week during surgery, what the data from thousands of patients confirms, and what the basic physics of the human airway demands. Side sleeping is good. The recovery position is better. If you do nothing else after reading this article, try the recovery position tonight.
What I See When People Sleep
I am a Consultant ENT Surgeon at the Royal National ENT Hospital and Queens Hospital in London, and a considerable part of my clinical work involves a procedure called drug-induced sleep endoscopy — DISE for short. I use sedation to guide someone into a sleep-like state, then pass a tiny camera through their nose and down into their throat to watch what happens to their airway in real time. I have performed thousands of these procedures, and some of what I see is difficult to unsee.
When a patient is lying flat on their back, the pattern is remarkably consistent. The tongue — which is a surprisingly heavy structure — drops backwards under gravity. In many patients it does not droop slightly; it falls directly into the throat, partially or completely blocking the passage of air. In patients with large tonsils, those fall back too, sometimes resembling a pair of curtains pulling closed across a doorway. The soft palate sags downward. In some patients the epiglottis — the small leaf of cartilage at the entrance to the voice box — folds back and adds to the blockage. Everything the airway needs to stay open is being pulled the wrong way.
Then I roll the patient onto their side. The change is immediate. The tongue shifts sideways rather than backwards. The tonsils fall to the side rather than across the airway. The soft palate hangs differently. In a significant number of patients, obstruction that was near-complete on the back simply disappears on the side — visible on the camera, without any drug or device, purely because we changed the patient's relationship with gravity.
The recovery position takes this a step further. When the head is positioned as it is in the first aid recovery position — slightly tilted back, face angled a little downward — the tongue does not just move sideways; it moves forward, away from the back of the throat. The pharyngeal muscles tighten slightly with the neck extension, lending structural support to the airway walls. The airway is not just unobstructed: it is actively held open by gravity rather than closed by it.
When I position patients in the recovery position rather than simply on their side, the improvement in airway patency is measurably better. The pharynx stays more open. The tongue sits further forward. The soft palate does not vibrate. You can see it on the camera.
Which is, of course, precisely why the recovery position is the first thing they teach you in first aid.
What is Actually Happening in your Throat when you Sleep
Your throat is, at its simplest, a soft tube. The pharynx — as clinicians call it — is made of compressible muscle and tissue, unlike the rigid windpipe below it which is held open by rings of cartilage. This tube can collapse. And during sleep, when your muscle tone falls, it becomes considerably more prone to doing exactly that.
Imagine a garden hose. When it is wide open, water flows easily. If you partially step on it, narrowing the diameter, the water speeds up. That faster-moving water exerts less sideways pressure on the walls of the hose — and so the walls become even more prone to collapsing inward. This is Bernoulli's principle in practice, and the same thing happens in your airway. Halve the radius of a tube and the resistance to airflow increases approximately sixteen fold. Small narrowings cause dramatic consequences.
When you lie on your back, gravity acts against everything. Your tongue, your tonsils, your soft palate — all are subject to a downward pull towards the back of your throat. Your muscles fight this pull, but at reduced capacity during sleep. During REM sleep — when your brain temporarily paralyses your body to stop you acting out your dreams — those muscles lose almost all their tone. This is why snoring is often worst in the second half of the night, when REM predominates, and why alcohol, which suppresses muscle tone from the outset, reliably makes snoring worse.
Snoring is what happens during partial airway collapse — the soft palate and uvula vibrating in the turbulent airstream. Sleep apnoea is complete collapse — breathing stops entirely until your brain wakes you just enough to restore muscle tone and reopen the airway. The two conditions exist on a spectrum, and most people who snore are somewhere along it. Untreated sleep apnoea is associated with raised blood pressure, increased risk of heart attack and stroke, impaired glucose regulation, weight gain, reduced concentration, and a significantly elevated risk of road traffic accidents.
These are not minor consequences of a little nocturnal noise. They are the accumulated effect of your airway collapsing hundreds of times per night, year after year.
Why Side Sleeping Helps Snoring & Sleep Apnoea
The most important thing side sleeping achieves is to remove the direct gravitational pull on the tongue and soft tissues of the throat. Instead of falling backwards into the airway, the tongue drops sideways. Instead of sagging down against the back of the throat, the soft palate falls laterally. The tonsils, if large, fall to the side rather than across the air passage.
The research confirms this mechanism in considerable detail. A 2002 study published in Anesthesiology examined patients with obstructive sleep apnoea under general anaesthesia — eliminating all neuromuscular contributions — and measured the structural properties of the passive pharyngeal airway in supine and lateral positions. The lateral position significantly increased the maximum cross-sectional area of the airway and decreased the closing pressure at both the retropalatal and retroglossal levels.1 In plain English: the airway was wider and harder to close in the lateral position, purely because of structural geometry.
A more comprehensive study published in Sleep in 2015 measured multiple physiological contributors to obstructive sleep apnoea simultaneously and found that lateral positioning significantly reduced pharyngeal critical closing pressure and improved both passive and active airway patency — without affecting loop gain or arousal threshold.2 The airway became more stable, more open, and more resistant to collapse, simply from changing position.
For straightforward snorers, the effect is particularly reliable. A study of 72 patients who underwent overnight polysomnography found that in the lateral position, most patients without sleep apnoea showed a significant reduction in both the time they spent snoring and the intensity of the noise.3 The gravitational load removed, the airway settled.
Why the Recovery Position is Better than Sleeping on your Side
Side sleeping is a substantial improvement over back sleeping. The recovery position is better still, and the reason is worth understanding.
Most people who try to sleep on their side do not achieve what a trained first aider would recognise as good lateral positioning. They lie approximately on their side, but without support, they drift. The body rotates progressively back towards the supine position. The neck ends up in flexion — chin dipping toward the chest — which narrows the airway. Some people manage to keep their body on their side but turn their head so that it is effectively pointing at the ceiling, allowing the tongue to fall backwards again. Neither of these is side sleeping in any meaningful therapeutic sense.
The recovery position addresses this directly. The head is positioned with a slight backward tilt — neck extension, not flexion — which does two things simultaneously. First, it mechanically straightens and opens the airway. Second, it places mild tension on the pharyngeal muscles, which provides structural support to the throat walls. The face is angled slightly downward, which means the tongue does not just fall sideways but actually tips forward, away from the back of the throat.
This is the fundamental difference. In standard side sleeping, gravity is no longer working against you. In the recovery position, gravity is working for you, pulling the tongue forward and maintaining the airway in its most open configuration.
Published DISE research supports this directly. A 2013 study found that nearly all patients with positional sleep apnoea showed at least partial improvement in airway collapse during lateral positioning, with the tongue base and epiglottis showing the greatest benefit.4 A separate study examining the structure of the upper airway found that the lateral position changes the airway from a more collapse-prone transversely elliptical shape to a more circular, structurally robust configuration.5 A further study examining patients during natural sleep found that epiglottic collapse — one of the more challenging patterns to treat — was virtually abolished in the lateral position, with ventilation increasing by 45% compared to the supine position.6
The recovery position is not a new idea. Emergency medicine has used it for decades, for the same anatomical reasons. When someone is unconscious and cannot protect their own airway, you place them in the recovery position because it is the most reliable way to keep breathing happening without any device or intervention. The question that sleep medicine has been slow to ask is why we regard this as an emergency measure rather than a nightly one.
If the recovery position is good enough to keep an unconscious person breathing safely, it deserves serious attention as a sleeping position for those of us who struggle to breathe at night.
The Data from 6,044 Sleep Studies
Several years ago, I sat down and analysed the sleep study data for 6,044 patients referred to the Royal National ENT Hospital and Queens Hospital with snoring or suspected sleep apnoea. Every patient had a sleep study that recorded their breathing in both the supine and lateral positions, and I looked at how many of them would have had a normal result had they simply stayed off their back all night.
The number that jumped out was this: 60.3% of the patients in whom sleep apnoea had been identified would have had no diagnosable sleep apnoea at all had they slept on their side throughout the night. Not reduced sleep apnoea. Normal sleep. Six people in ten who had been referred to a hospital sleep clinic may not have needed any treatment, other than to change their sleeping position.
A further 85.7% would have been at least 20% better on their side. Some of these patients had overall apnoea-hypopnoea indices — the clinical measure of how many breathing events occur per hour — of 40, 50, or even 60 in the supine position, which earns the label of severe sleep apnoea. But in the lateral position, those numbers dropped to within normal limits. These patients were being classified as having severe sleep apnoea when they really had severe positional sleep apnoea, which is a critically different diagnosis in terms of treatment options.
I subsequently published a formal analysis of 1,090 consecutive NHS patients studied on a validated home sleep-testing device at a single tertiary service between 2017 and 2024. The findings were consistent with the larger dataset:
• 86.1% of patients demonstrated at least a 10% improvement in AHI when sleeping non-supine
• 66.6% met the established clinical definition of positional sleep apnoea
• 35.9% — over one third of all patients with confirmed obstructive sleep apnoea — showed complete normalisation of their AHI when sleeping off their back
This last figure matters. These are not patients whose sleep apnoea improved slightly. These are patients whose sleep apnoea, measured objectively, disappeared entirely when they were not supine. They are currently being offered CPAP machines and surgical referrals when, in many cases, the treatment they need is a change in their sleeping position.
Who benefits Most from Side Sleeping
The research also identifies who is most likely to benefit from positional therapy, and honesty requires acknowledging the limits.
Patients of normal or slightly overweight BMI benefit most significantly, with median positional improvement of around 77–79% in the NHS cohort data. The mechanism is essentially gravitational: in leaner patients, the airway obstruction is primarily caused by the tongue and soft palate falling back under gravity, and position directly counters this. In patients with a BMI above 35, the median improvement is around 36%, reflecting the fact that increasing fat deposits within the airway walls create a degree of structural obstruction that is less sensitive to positional change.
Age is not a predictor of who benefits, which matters clinically. The data show consistent positional benefit across all decades of adult life, including patients over 70. Older patients are often told that their snoring is simply age-related and that little can be done. That is not what the data shows.
The sex differences are modest but interesting. Men show slightly greater positional benefit overall. In women, positional sleep apnoea appears to emerge most prominently around the menopause — driven not primarily by weight gain but by hormonal changes that reduce upper airway neuromuscular tone — before potentially progressing to a less position-dependent pattern as the condition advances. Recognising this window may be important for early intervention in peri-menopausal women.
None of this means positional therapy works for everyone. Patients with severe OSA and significant obesity often have multilevel structural obstruction that position alone cannot overcome, and those patients need CPAP, mandibular advancement devices, or surgical assessment. But they should still sleep on their side if at all possible; even in the severe obesity group, a 36% median improvement is not negligible.
What the mattress manufacturers got wrong — and what our ancestors knew
We did not always sleep on flat mattresses. For most of human history, people slept on ground surfaces with natural contours — small depressions for the shoulder, raised areas for the head, irregularities that accommodated the body rather than forcing it to adapt to a perfectly uniform plane. The result, as explored in detail in our article on the evolutionary evidence for side sleeping, is that lateral and semi-prone positions — positions very similar to the recovery position — appear to be the natural human default.
Our closest primate relatives construct nests from branches and leaves each night, creating sleeping surfaces with exactly the kind of contoured support that lateral sleeping requires: space for the shoulder, a platform for the head, structural stability against rolling. Indigenous communities observed sleeping without modern beds overwhelmingly adopt lateral positioning. They do not do this because they have studied airway physiology; they do it because it is comfortable when the surface beneath you is shaped appropriately.
The modern flat mattress is an excellent surface for sleeping on your back. It is a poor one for sleeping comfortably on your side. This has been compounded by decades of mattress marketing that emphasises spinal alignment and uniform support, both of which are more relevant to the supine position than to the lateral one. We have, without quite intending to, engineered our way into a sleeping position that is less natural and physiologically less healthy for our airways.
Why the recovery position is harder than it sounds — and why people give up
This is where complete honesty is necessary, because the recovery position is not comfortable to maintain through a full night without the right support, and anyone who says otherwise has probably not tried it seriously.
The problems people encounter are genuine anatomical ones, and they are consistent enough across patients to be worth naming:
The Ear
After a few nights sleeping on the side, many people develop a painful spot where the upper ear presses against the pillow. The ear is largely cartilage covered by a thin layer of skin with very little cushioning. Sustained pressure on it can progress to chondrodermatitis nodularis helicis — a genuinely painful nodule on the ear rim that makes side sleeping feel impossible, and which trains your unconscious mind to shift you back onto your back during the night.
The Shoulder
The shoulder was not designed to bear the weight of your upper body for eight hours. Sustained compression can irritate the bursa, cause rotator cuff tendon pain, and in time progress to subacromial bursitis. This is not a trivial complaint; it can require months of physiotherapy and will reliably prevent sustained side sleeping if it develops.
The Arm
The lower arm has nowhere comfortable to go during standard side sleeping. Pressure on the ulnar nerve at the elbow produces the pins and needles that wake people in the early hours. Chronic compression can progress to cubital tunnel syndrome, which is a medical condition requiring treatment, not a transient annoyance.
The Pillow Height
Standard pillows are designed for back sleepers, for whom the distance from the mattress to the back of the head is eight to twelve centimetres. On your side, the relevant distance is from the mattress to the side of your head, accounting for your shoulder width — typically fifteen to twenty-five centimetres for most adults. A standard pillow leaves the neck bent; stacking two creates different problems. Incorrect pillow height causes neck pain that people attribute to side sleeping itself, when the issue is actually the wrong equipment for the position.
The Face
In the recovery position, the face tilts slightly downward. On a standard pillow, this means the nose and mouth press into the surface. People instinctively rotate away from this, abandoning the positional benefit. There is no separation, in a conventional pillow design, between the surfaces that support the head and those that the face presses against.
The Hip
Hip bursitis from sustained lateral compression is a common complaint, particularly in women, and is enough on its own to drive people back onto their backs.
Taken individually, any one of these issues might be manageable. In combination, they are the reason that simply telling patients to sleep on their side has historically produced such inconsistent results. The advice is correct. The implementation, without proper support for each of these pressure points, is genuinely difficult to sustain.
People do not give up on side sleeping because side sleeping does not work. They give up because uncomfortable side sleeping does not work. These are different problems.
How to Sleep in the Recovery Position Comfortably
The principles of a sustainable recovery position during sleep are the same as in first aid, adapted for overnight comfort. You need:
• Lateral positioning that physically resists rolling backwards, not just an intention to stay on your side
• Neck extension, not flexion — your head should maintain a slight backward tilt that keeps the airway open and the pharyngeal muscles under supportive tension
• Shoulder clearance — some mechanism that takes the weight of your torso off the shoulder joint rather than compressing it
• Face clearance — the ability to maintain the slight forward face angle of the recovery position without pressing your nose into the pillow surface
• Body stability — enough support across the torso and hip that you maintain the position through normal sleep movement without conscious effort
A standard pillow was designed to address none of these. It was designed for neck support during back sleeping. This is why the history of people trying to construct a workable side-sleeping setup from ordinary pillows, rolled-up towels, and backpacks filled with tennis balls is a long one — it is the right instinct applied to the wrong equipment.
If you want to try it tonight without anything special: lie on your side with your body straight, not curled. Keep your chin up — not tucked — so the neck is gently long. Rest your face so it is tilted slightly forward, nose angled toward the mattress, not toward the ceiling. Bend your top knee and rest it on a pillow for stability. Use a pillow that is higher than you think you need, to account for the shoulder width. And ask whoever sleeps next to you to let you know in the morning whether anything was different.
Most people who do this properly, even with ordinary bedding, will notice some improvement. The challenge is making it sustainable — which, ultimately, is what the design of any proper side-sleeping support needs to solve.
How Big a Problem is Snoring and Sleep Apnoea
Obstructive sleep apnoea affects an estimated one billion people worldwide.7 CPAP — continuous positive airway pressure — remains the gold standard treatment and genuinely saves lives; around 50% of patients, however, use it for less than the recommended four hours per night, leaving a substantial proportion of the sleep apnoea population inadequately managed.8 Surgery has its place. Mandibular advancement devices help many people. All of these interventions have important roles.
But the data from both my own clinical cohorts and the broader published literature suggests that the majority of patients with obstructive sleep apnoea have a condition that is at least partly positionally dependent. Six people in ten who reach a hospital sleep clinic may have sleep apnoea that normalises with lateral sleep. Over eight in ten show meaningful improvement. The current clinical pathway, in most centres, sends these patients directly towards CPAP or surgical assessment without systematic positional analysis and rarely with a structured conversation about sleep position as a primary intervention.
The Cochrane review of positional therapy found insufficient evidence to recommend it routinely, largely because the randomised trial data are limited. What we have instead is unambiguous mechanistic evidence, imaging data confirming the airway opens in the lateral position, and real-world cohort data from thousands of patients demonstrating a large and consistent effect. The absence of trial data does not mean the approach does not work; it means the trials have not yet been done at sufficient scale. Positional therapy carries no significant adverse effects, requires no prescription, and can be tried at no cost tonight.
There is no pharmaceutical company promoting it. No device manufacturer with a sales team visiting sleep clinics. It is simple, it is cheap, and it works for a majority of people with positional sleep apnoea. That, in itself, is probably part of the reason it has been overlooked.
The recovery position kept your unconscious great-grandmother breathing after a medical emergency. It may be the most useful thing you can do for your own airway while you sleep.
My Side Sleeping Pro support system is designed to help you sleep on your side.
References
1. Isono S, Tanaka A, Tagaito Y, Ishikawa T, Nishino T. Lateral position decreases collapsibility of the passive pharynx in patients with obstructive sleep apnea. Anesthesiology. 2002;97(4):780–785.
2. Joosten SA, O'Driscoll DM, Berger PJ, Hamilton GS. The effect of body position on physiological factors that contribute to obstructive sleep apnea. Sleep. 2015;38(9):1469–1478.
3. Nakano H, Ikeda T, Hayashi M, Ohshima E, Onizuka A. Effects of body position on snoring in apneic and nonapneic snorers. Sleep. 2003;26(2):169–172.
4. Victores AJ, Hamblin J, Gilbert J, Switzer C, Takashima M. Usefulness of sleep endoscopy in predicting positional obstructive sleep apnea. Otolaryngol Head Neck Surg. 2013;150(3):487–493.
5. Walsh JH, Leigh MS, Paduch A, et al. Effect of body posture on pharyngeal shape and size in adults with and without obstructive sleep apnea. Sleep. 2008;31(11):1543–1549.
6. Marques M, Genta PR, Azarbarzin A, et al. Effect of sleeping position on upper airway patency in obstructive sleep apnea is determined by the pharyngeal structure causing collapse. Sleep. 2017;40(3):zsw002.
7. Benjafield AV, Ayas NT, Eastwood PR, et al. Estimation of the global prevalence and burden of obstructive sleep apnoea: a literature-based analysis. Lancet Respir Med. 2019;7(8):687–698.
8. Weaver TE, Grunstein RR. Adherence to continuous positive airway pressure therapy: the challenge to effective treatment. Proc Am Thorac Soc. 2008;5(2):173–178.
Vik Veer is a Consultant ENT Surgeon at the Royal National ENT Hospital and Queens Hospital, London, and the author of The Pillow Book (2026). He runs iwantgreatsleep.com and has spent several years researching why so few patients are told about the single most accessible intervention available for snoring and sleep apnoea.
