Best Sleeping Position: A Guide to Side, Back, and Stomach Sleeping

The best sleeping position is the one that keeps your spine aligned, your airways open, and your body comfortable through the night. There's no universal "right" answer — different positions suit different bodies, sleep styles, and personal comfort preferences — but understanding the trade-offs helps you choose wisely.

Key Takeaways

• Side sleeping is the most popular position globally and supports good spinal alignment with the right pillow.
• Back sleeping offers natural spine alignment but can worsen snoring for some people.
• Stomach sleeping is generally the most challenging position for spinal comfort and is often discouraged.
• Most people are combination sleepers — and that's perfectly fine if you have the right mattress and pillow setup.

This guide walks through the pros and cons of each sleeping position, how they affect your body, and how to optimise whichever you prefer.

Why Sleeping Position Matters

Your sleeping position affects how your spine sits, how your muscles rest, how easily you breathe, and how soundly you sleep. While every position has people who swear by it, some are easier on the body than others.

Spinal alignment. When you sleep, your spine ideally maintains the same gentle S-curve it has when you're standing upright. Some positions support this naturally; others bend or twist the spine in ways that lead to morning stiffness and gradual joint wear.

Muscle tension and morning soreness. If your sleep position forces certain muscles to work all night to support your head, neck, or lower back, you'll feel it in the morning. The right position lets your muscles fully relax.

Circulation and breathing. Some positions compress major blood vessels or partly close the airway — increasing snoring and disrupting sleep. Side sleeping generally keeps the airway most open.

Snoring tendencies. Back sleeping is the position most likely to cause snoring, because gravity pulls the tongue and soft palate toward the back of the throat. Side sleeping usually reduces snoring significantly.

Individual variation. Your body shape, weight, mobility, and personal comfort all influence which position works best for you. The "right" position is partly about ergonomics and partly about what lets you actually fall asleep.

Side Sleeping

Side sleeping is the most common position globally and one of the most ergonomically friendly — provided you have the right pillow and mattress to support it.

Benefits:

• Keeps the airway naturally open, reducing snoring
• Allows good spinal alignment when paired with a proper pillow
• Generally comfortable for most body types
• Reduces back pressure compared with back sleeping for some sleepers

Drawbacks:

• Can create shoulder pressure on the side you're lying on
• Sometimes leads to arm numbness if your circulation is restricted
• Hip pressure on softer mattresses

Left side vs right side. Both sides are fine for most sleepers. Some people find left-side sleeping more comfortable for digestion, while right-side sleepers sometimes report less shoulder strain. There's no strict "right" side — pick whichever feels more natural.

Comfort considerations. Those who are pregnant often find left-side sleeping more comfortable, particularly later in pregnancy, as it reduces pressure on certain blood vessels. People who experience reflux sometimes find left-side sleeping helps too.

Optimal support for side sleepers:

• A medium to firm mattress that supports the hips and shoulders
• A high-loft pillow (10–15 cm) to fill the gap between head and shoulder
• A pillow between the knees to keep the hips aligned

For position-specific pillow guidance, see our best pillow for your sleep position guide.

Back Sleeping

Back sleeping is the second most popular position and the one most often recommended for spinal alignment, though it has its own trade-offs.

Benefits:

• Naturally maintains the spine's neutral curve when properly supported 

• Distributes body weight evenly across the mattress

• Reduces facial pressure, which some people prefer for skin and wrinkle prevention

• Keeps the head, neck, and spine in a single line with the right pillow

Drawbacks:

• More likely to cause or worsen snoring (gravity pulls the tongue and soft tissues backward)

• Can cause lower back discomfort if the mattress is too soft or there's no lumbar support

• Some people find it harder to fall asleep on their back if they're not used to it

Lower back support. Without proper support, back sleeping can leave a gap between the lower back and the mattress, which strains the lumbar muscles. A small pillow or rolled towel under the knees can reduce this — it lets the lower back relax onto the mattress rather than arch.

Pillow height matters. Back sleepers need medium-loft pillows (7.5–12.5 cm). Too high and your chin gets pushed toward your chest; too low and your head drops backward. The right pillow height keeps your face roughly parallel to the ceiling.

Stomach Sleeping

Stomach sleeping is generally considered the most challenging position for spinal alignment, though some people find it comfortable and have slept that way their whole lives.

Benefits:

• Can reduce snoring (the airway stays open)
• Some people find it comforting and prefer it despite the trade-offs

Drawbacks:

• Forces the neck to twist 90° to one side all night
• Causes the lower back to arch into the mattress
• Can flatten the natural curve of the spine
• Often leads to morning neck stiffness and lower back tension

Why is it challenging long-term? Stomach sleeping puts extra stress on the back, neck and shoulders — the combination of a twisted neck and arched lower back puts pressure on the spinal joints and supporting muscles, which can lead to chronic stiffness over time. Many spine and posture specialists discourage stomach sleeping for this reason. 

Modifications for stomach sleepers:

• Use the thinnest possible pillow, or no pillow at all
• Place a slim pillow under the hips to flatten the lower-back arch
• Try a firmer mattress that doesn't let the hips sink in deeply

Transitioning to a better position. If you want to move away from stomach sleeping, the easiest transition is to side sleeping. Try lying on your side with a body pillow you can cuddle — many former stomach sleepers find this approximates the "hugging" feel of stomach sleeping while reducing the neck strain.

Combination Sleeping

Combination sleeping — changing positions throughout the night — is actually the most common pattern. Most people don't stay in one position for eight hours; they shift between two or three over the course of a night.

Benefits of position variation:

• Reduces pressure points by redistributing your weight
• Improves circulation by changing which blood vessels are compressed
• Lets different muscle groups rest at different times
• Generally signals healthy, active sleep

Mattress and pillow requirements. Combination sleepers need bedding that adapts:

• A medium-firm mattress that supports multiple positions without being too rigid
• A medium-loft, adjustable pillow (around 10 cm) that works for back and side sleeping
• Responsive materials (latex, hybrid foam, pocket springs) that don't trap you in one position

Most common pattern. The typical combination sleeper starts on their back, shifts to a side at some point, and may finish on the other side or back again. Smaller numbers shift to stomach for parts of the night. There's nothing wrong with any of these patterns.

How Sleep Position Affects Your Body

Different positions create different pressure points and demands on your body. Knowing where the stress falls helps you choose mattresses, pillows, and supports that compensate.

Shoulder and hip pressure points. Side sleepers concentrate weight on the shoulder and hip touching the mattress. A softer mattress or a memory foam topper helps reduce this pressure. Back sleepers spread weight more evenly, with no single high-pressure zone.

Neck and cervical alignment. Side sleepers need higher pillow loft to keep the neck level with the spine. Back sleepers need lower loft. Stomach sleepers need minimal loft. Getting this wrong is one of the main reasons people wake with neck stiffness.

Lower back support. Back sleepers benefit from a slight lumbar fill or a knee pillow that flattens the lower-back arch. Side sleepers are usually fine without lumbar support, provided the mattress supports the hips properly. Stomach sleepers struggle most here — there's no easy way to support the lower back while the hips are pressing into the mattress.

Circulation and nerve compression. Side sleeping can cause arm numbness if your circulation is partly restricted by the position of your arm under your head. Try sleeping with your arm extended in front of you rather than tucked under, or use a pillow to keep it in a neutral position.

Individual differences. Body weight, height, and shape all affect which positions feel best. Heavier sleepers usually need firmer mattresses across all positions. Taller sleepers need to check that their feet don't hang off the bed in any position. Smaller-framed sleepers often prefer softer mattresses with more cushioning.

Best Position for Back Pain

If you experience back discomfort, the right sleeping position can make a real difference — though it's not a substitute for proper medical advice if pain is severe or persistent.

Back sleeping with lumbar support. Often recommended as the most spine-friendly position for those with lower back tension. Pair it with a small pillow under the knees to reduce lumbar arch and let the back muscles relax overnight.

Side sleeping alternatives. Side sleeping with a pillow between the knees is the second-best option for back-pain sleepers. It keeps the hips, pelvis, and spine aligned and is often more comfortable than back sleeping for those who can't sleep flat.

What to avoid. Stomach sleeping tends to be the worst position for lower back discomfort because of the lumbar arching it causes. If you currently stomach-sleep and experience back pain, transitioning to side or back sleeping often helps.

Mattress and pillow solutions. A medium-firm mattress (6–7 out of 10 firmness) is most often recommended for back-pain sleepers — too soft and the hips sink, too firm and pressure points develop. Pair this with a memory foam topper if your existing mattress is the wrong firmness, or upgrade to a new mattress designed for back support.

When to seek professional advice. Persistent or severe back pain isn't a sleeping-position problem alone. If pain is interfering with your daily life or hasn't improved with bedding changes, speak with a GP, physiotherapist, or chiropractor.

Best Position for Reducing Snoring

If snoring is disrupting your sleep — or your partner's — your sleeping position is one of the simplest things to change.

Why side sleeping helps. Side sleeping keeps the airway naturally open because gravity doesn't pull the tongue or soft palate toward the back of the throat. Most snorers find dramatic improvement just by switching from back to side sleeping. 

Why does back sleeping increase snoring? When you lie on your back, gravity pulls relaxed muscles in the throat downward, partially blocking the airway. Air has to work harder to get through, creating the vibration that causes snoring.

Pillow height and positioning. Slightly raising your head with a higher-loft pillow can help reduce snoring by keeping the airway open. A wedge pillow that elevates the entire upper body works even better for chronic snorers.

Mattress firmness. A mattress that's too soft can let your shoulders sink deep enough that you naturally roll onto your back. A medium-firm mattress holds you better in side-sleeping position.

When snoring isn't just position-related. Loud, persistent snoring or snoring with breathing pauses can be a sign of sleep apnoea, which is a medical condition that requires professional assessment. If snoring is severe, see a GP.

How to Change Your Sleep Position

Switching sleeping positions takes time. Your body has trained itself in the old position over years; expecting to change overnight is unrealistic.

Gradual transition strategies:

• Use a body pillow to "hug" while transitioning from stomach to side sleeping
• Place pillows behind your back to discourage rolling from side to back (or vice versa)
• Sew a tennis ball into your pyjama back if you're determined to stop back-sleeping (an old trick that works)

Pillow and mattress adjustments. A new sleeping position usually requires a new pillow loft. If you're moving from back to side sleeping, you'll need a thicker pillow. From side to back, a thinner one.

Adjustment period. Most people adapt to a new sleeping position in 2–4 weeks of consistent practice. The first week is the hardest — you'll often roll back to your old position in your sleep without realising. After about two weeks, the new position starts feeling natural. 

When position change helps vs harms. If you're changing positions because you're experiencing discomfort, it's usually worth the transition. If you're trying to change purely for theoretical "alignment" benefits and your current position is comfortable, the disruption may not be worth it.

Finding Your Best Position

The best sleeping position is the one where you fall asleep easily, stay asleep through the night, and wake without stiffness or pain.

Personal comfort assessment. Notice how you feel in the morning. If you wake refreshed and pain-free, your current position is probably fine. If you wake stiff or sore, your position (or your pillow/mattress) may need adjusting.

Trial period approach. When trying a new position, give it 2–3 weeks before judging. The first few nights will feel awkward — that's normal. Persist with the same position consistently.

Support modifications. Often the issue isn't your position — it's the bedding supporting it. Before changing position entirely, try a different pillow, a mattress topper, or a knee pillow. These small changes often solve the problem without requiring you to retrain your sleep habits.

Health condition considerations. If you have specific conditions — pregnancy, reflux, sleep apnoea, chronic back pain — your healthcare provider can recommend a sleeping position that suits your situation. The ideal sleeping position is sometimes a compromise between comfort and health needs.

Mattress and pillow as a system. Your sleeping position is only one part of a comfortable sleep setup. The mattress, pillow, and even the sheets all work together. For more on choosing the right mattress, see our guide to the best mattress for Australian sleepers.

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