The Night Shift: How Sleep Rebuilds Your Spine — and How to Stop Sabotaging It

You don't heal at the gym, and you don't heal in my office. You heal in bed. Sleep is the one stretch of your day when your spine is finally unloaded, your discs drink back the water they lost, and your nervous system runs its nightly repair crew. Skimp on it — or spend it in a position that fights your spine — and you wake up further behind than when you went to bed. Let's fix that. Your Spine Works the Day Shift. Sleep Is the Repair Shift. From the moment you stand up in the morning, gravity goes to work on your spine. Every disc between your vertebrae — soft, water-rich cushions that absorb shock and let you bend and twist — gets gently squeezed all day long. Water slowly presses out of them. This is why you are measurably shorter at night than you were in the morning , often by half an inch or more. Your discs have quite literally been compressed. Lying down reverses it. When you sleep, the load comes off and the discs rehydrate, swelling back up as water and nutrients flow in. The cartilage, ligaments, and small spinal muscles you stressed during the day get repaired. Growth hormone — the body's primary tissue-repair signal — surges during deep sleep. Inflammation winds down. Your brain even runs a cleaning cycle, flushing metabolic waste through a system that's far more active while you sleep. None of this happens efficiently if you cut the night short. • ~1/3 — of American adults regularly get less than the recommended 7 hours of sleep • ~0.5 in — how much you can shrink over a day as spinal discs lose water — restored overnight • 2x — poor sleepers are about twice as likely to develop chronic pain over time The Pain–Sleep Loop That Traps So Many People Here's the trap I see constantly. A patient's back hurts, so they sleep poorly. Poor sleep then turns up the volume on pain — research shows that a single night of bad sleep lowers your pain threshold the next day, making the same injury feel worse. Now they hurt more, so they sleep even less. Around and around it goes. This isn't in their head. Sleep loss sensitizes the nervous system, ramps up inflammatory chemicals, and reduces the brain's natural pain-dampening ability. That's why two people with the identical MRI can have wildly different pain levels — the well-rested one simply has a nervous system that's better at turning the volume down. The encouraging flip side: when you break the loop and restore good sleep, pain often eases on its own, sometimes dramatically. • The takeaway: if you're doing everything right — exercising, stretching, getting adjusted — but still waking up stiff and sore, your sleep may be the missing piece. You can't out-train a bad night. How You Sleep: Position Matters More Than You Think There's no single "perfect" position for everyone, but the principle is simple: keep your spine in roughly the same neutral, gently-curved shape it has when you're standing with good posture. The enemy is any position that twists, flattens, or kinks that line for hours at a time. Here's how the common positions stack up. • 😄 Back — Best for Most — Distributes weight evenly and keeps the head, neck, and spine aligned. Slip a pillow under your knees to support the natural curve of your lower back and take pressure off the discs. • 🙂 Side — A Close Second — Great for many, especially for snoring and reflux. The key is a pillow between your knees so your top leg doesn't drag your pelvis and lower spine into a twist. Keep a slight bend in the knees, not a tight curl. • 😕 Stomach — The One to Retire — The toughest on your spine. It flattens the lower back and forces your neck to crank to one side for hours. If you can't break the habit, a thin pillow under your hips — and barely any under your head — reduces the strain. The Pillow Test Most People Fail Your pillow has one job: to fill the gap between your head and the mattress so your neck stays in line with the rest of your spine — not propped up, not drooping down. The right height depends entirely on your position. • A 10-Second Check — Have someone look at you from the side, or use a mirror, as you lie in your usual position. On your back , your chin should be neither tucked toward your chest nor tipped back — the pillow should support the curve of your neck, not shove your head forward. On your side , your nose should line up with the center of your chest, your head level — not tilting down toward the mattress or propped up toward the ceiling. If your head is cocked in either direction, your pillow is the wrong height, and your neck is paying for it all night. Side sleepers generally need a firmer, taller pillow to fill the broader gap created by the shoulder. Back sleepers need something thinner. Stomach sleepers need almost nothing. And every pillow has a lifespan — if yours is flat, lumpy, or folded in half to get enough height, it's done its tour of duty. The Mattress Question Patients ask me constantly whether they need a rock-hard mattress. The honest answer from the research may surprise you: medium-firm tends to win for most people with back pain, not the firmest option on the floor. A surface that's too soft lets your hips and shoulders sink until your spine sags into a hammock; one that's too hard creates pressure points and won't accommodate your natural curves. You want enough give to let your shoulders and hips settle in slightly, with enough support to keep everything else level. A useful rule of thumb: if you consistently wake up stiff and sore but feel looser an hour after getting up, suspect your sleep surface. If a mattress is sagging in the middle or is more than roughly eight to ten years old, it may be quietly working against you every night. Building a Spine-Friendly Night Position and equipment matter, but so does the quality of sleep itself — the deep stages are when the real repair happens. A few simple habits move the needle more than any gadget: • 1. Keep a consistent schedule — Going to bed and waking at roughly the same times — even on weekends — is the single most powerful thing you can do for sleep quality. Your body runs on a clock, and it rewards predictability with deeper sleep. • 2. Dim and cool the room — A cool, dark, quiet bedroom (around 65°F for most people) signals your body to release melatonin and drop into deep sleep. Blackout curtains and silenced notifications earn their keep. • 3. Put the screens to bed first — The blue light from phones and tablets suppresses melatonin and keeps your brain alert. Aim to be off screens 30–60 minutes before bed — and keep the phone off the nightstand if you can. • 4. Watch the late caffeine and alcohol — Caffeine can linger in your system for 6–8 hours, so an afternoon coffee may still be working at bedtime. Alcohol helps you fall asleep but fragments the deep, restorative stages later in the night. • 5. Unload your spine before bed — A few minutes of gentle stretching — knees to chest, a soft spinal twist, child's pose — releases the day's tension and helps your discs begin decompressing before your head hits the pillow. • Morning tip: your discs are at their most swollen and vulnerable right after you wake. Avoid heavy lifting, deep toe-touches, and aggressive stretching in the first 30–60 minutes out of bed. Let your spine wake up before you ask it to work. Where Chiropractic Care Fits In Sleep and spinal health feed each other in both directions. When a joint in your spine isn't moving well, it irritates the surrounding nerves and muscles, and that low-grade tension can keep you from settling into deep sleep — you toss, you turn, you never fully relax. Restoring proper motion to those joints calms the nervous system and often makes it easier to fall and stay asleep. Many patients tell me the first thing they notice after we get their spine moving well isn't less pain — it's that they're finally sleeping through the night. It works the other way too: better sleep gives your body the repair window it needs to actually hold the gains we make in the office. Care and sleep aren't separate projects. They're two halves of the same recovery. The Bottom Line You spend roughly a third of your life in bed, and that third is when your spine does its most important work — rehydrating, repairing, and resetting for another day under gravity. Treat sleep as part of your health plan, not the leftover hours after everything else. Pick a position that keeps your spine neutral, get your pillow height right, give your discs a supportive surface, and protect the quality of those hours. Do that, and you'll feel the difference where it counts: in how you stand up tomorrow morning. Waking Up Stiff and Sore Most Mornings? Dr. Lavigne can assess what's keeping your spine from recovering overnight — and build a plan that has you waking up looser, not stiffer. Schedule Your Visit →