Do Lumbar Support Pillows Work? What the Studies Measured, and What They Left Out

We found only small, short studies of lumbar support pillows. In one, partly funded by the tested pillow's maker, posture moved a few degrees but comfort ratings did not. None tested ours. Back pain with pain, tingling, weakness or numbness in both legs, with chest pain, or after a serious accident needs emergency care.

01What would it mean for a lumbar pillow to work?

A lumbar support pillow is a cushion that sits between the small of your back and the chair's backrest to fill the inward curve of your lower back while you sit. It is mid-afternoon, your lower back aches, and you are not sure the pillow behind you, or the one in your cart, does anything.

Part of the confusion is that "work" can mean three things: how your back sits in the chair (posture), how it feels (comfort ratings), or whether people end up with back pain at all. The studies below measured different ones.

OSHA, the US workplace safety agency, puts the backrest's job this way: "The backrest should conform to the natural curvature of your spine, and provide adequate lumbar support."¹ Nothing here names a cause for your back or replaces asking a health professional.

02When is a sore back more than a chair problem?

The easy guess is the chair. Check these signs first.

Get emergency care

The NHS, the UK's health service, sends you to emergency care if you have back pain and:²

• Pain, tingling, weakness or numbness in both legs.
• A loss of feeling around your genitals or anus.
• Changes in your bladder or bowels, such as trouble peeing or losing control of either.
• Changes in how your genitals feel during sex, or trouble getting or keeping an erection or reaching orgasm.
• Chest pain.
• Pain that started after a serious accident, such as a car accident.

Do not drive yourself. Ask someone to drive you, or call for an ambulance.²

Get care right away

Get care right away if you have back pain and:²

• You feel hot, cold, shivery or generally unwell.
• The pain is severe and started suddenly, or it is getting worse quickly.

Ask a health professional

Ask a health professional if you have back pain and:²

• It has not improved after a few weeks of caring for it at home.
• It does not improve after resting, or it is worse at night.
• It stops you from doing your day-to-day activities.
• You are worried about the pain or struggling to cope.
• You have lost weight without trying to.
• There is a lump or swelling in your back, or your back has changed shape.
• It is worse when you sneeze, cough or strain on the toilet.
• It comes from the top of your back, between your shoulders, rather than your lower back.

Unsure which list a sign belongs to? Act on the more urgent one. None of these is a job for a pillow.

Desk & OfficeMorncrest® Seat Cushion & Lumbar Support Set $89$129

03What did studies of lumbar pillows measure?

You might hope for one big study with a clear answer. We found small, short ones.

Twenty-eight men sat in a standard office chair for 30 minutes without a lumbar pillow and for 30 minutes with one.³ That pillow had a cutout at the bottom for soft tissue at the back of the pelvis.³ Half the men had low back pain, and it was mild.³ The researchers tracked posture with skin sensors, weight shifting on the seat (more shifting read as more discomfort), and comfort ratings.³

With the pillow, the lower back kept more of its inward curve and the part just above it curved more, by a few degrees the authors call small.³ The weight-shift measure improved, but there were "no subjective changes in comfort": the men did not rate it as more comfortable.³ The limits: men only, mild pain, half an hour, sensors on the skin, and the authors' note that results may not generalize to longer sitting.³ The tested pillow's maker helped fund the study, with a college; the paper says the funder had no direct role in the analysis, and the authors declare no competing interests.³

The second study set out to compare a fixed lumbar support with one that moved continuously during long sitting, by the sitters' own discomfort ratings.⁴ In it, 31 men without low back pain sat in the same chair for two hours on each of three days, with no support, a fixed one or the moving one.⁴ Both supports were inflated to the same pressure.⁴ Compared with no support, both supports brought better ratings of low back pain, stiffness and fatigue felt while sitting, and the two supports did not differ.⁴ Its limits: men without back pain, two hours in one chair, the sitters' own ratings, and an inflatable support, not foam.

We could read only its abstract, which names no funder and no disclosure, so we cannot tell you who paid.⁴ A public grant record in Japan shows the first author held a grant to develop a moving lumbar support for long sitting, though not whether it paid for this study.⁵

How we read the pair: both lumbar support studies were small, short and in men only, and neither followed back pain over weeks. So they cannot show what a pillow does for your back over time.

04What did seat cushion studies measure?

Maybe the problem is under you, not behind you.

In one seat cushion study, office workers in Bangkok at high risk of neck and back pain got an air-filled seat cushion built to encourage shifts in posture, or a placebo foam seat pad.⁶ Over six months, 10 percent of the cushion group developed low back pain, against 59 percent of the pad group.⁶ In workers who had pain, the cushion did not reduce pain and disability compared with the pad.⁶

The authors note a relatively small sample and self-report, and urge caution with other populations and with working from home.⁶ The cushion is being patented by a national research council and a university, two authors are listed as inventors and may benefit, and a car seat company gave partial funding.⁶ In our reading, only the cushion was built to encourage shifts, so the result is about movement, not a foam cushion that sits still.

In another, 75 professional drivers, all men, with long-lasting low back pain used a gel seat cushion or a plain foam cushion of the same size while driving for three months.⁷ Pain scores and scores on a disability questionnaire improved in both groups, and the gel group's pain score improved more.⁷ The gel cushion's company funded it, with no role in the design or analysis, the paper says.⁷ No group drove without a cushion, so the study cannot tell whether the foam group would have improved anyway. The authors add that it was short compared with how long the pain had lasted.⁷

As we read them together:

• The pillow study took shifting on the seat as a sign of discomfort.
• The Bangkok study built a cushion to encourage shifts and counted who developed back pain.
• In the moving support study, sitters rated the moving and the fixed support alike.

They measured different things, so none tells you whether shifting in your seat is good or bad for your back. A cushion that makes you shift is a different thing from a support in the small of your back.

Office

Morncrest® Seat Cushion & Lumbar Support Set

A seat cushion and a lumbar pillow, one matched set. Both covers unzip and wash.

See the set ›

05How do you use a lumbar pillow on your chair?

It felt good, then dug in within minutes. Or it pushed you toward the middle of the seat, or sat slightly off and felt useless. Check where it sits before you give up on it.

OSHA, writing for office chairs, says a backrest should have a lumbar support that is height adjustable "so it can be appropriately placed to fit the lower back."¹ OSHA also says, "The outward curve of the backrest should fit into the small of the back."¹ For depth, the seat should support most of your thigh without its front edge touching the back of your knee.¹

Our reading: anything in front of the backrest moves you forward on the seat, so a support can take seat depth you need.

The order we suggest, not a medical method:

1. Sit all the way back first.
2. Place the support where the backrest's curve should meet the small of your back.
3. Check the seat edge behind your knees; if it now touches them, or you sit perched mid-seat, move the support or sit without it.
4. Change one thing at a time, and give it part of a working day before you judge it.
5. If it digs in, move it a little up or down first; if your back hurts more with it, take it out.

In a car, the seat comes first: see how to set the car seat before you add a lumbar cushion.

The steps above apply to the back piece we make, too. It belongs to our Seat cushion and lumbar set and sits against the backrest, in the small of your back. No study in this guide tested it, so we tell you where it goes, not what it does.

06How can you tell if it is working for you?

Is the comfort you feel only short-term? The lumbar support studies were short, and none used your chair, so your own workdays are the check.

If your chair has no lumbar support, OSHA says to "use a rolled up towel or a removable back support cushion to temporarily provide support and maintain the natural curve of the spine."¹ We make a lumbar pillow, and we still think a towel is a fair way to learn whether you want anything there before you buy one.

Then keep a short log, our idea rather than a study's: a few workdays as you sit now, then a few with a support, same chair, same hours. Each day, note when the ache starts, how your back feels when you stand at day's end, and, on support days, where it sat. Use the log to compare setups, not to wait out pain.

The NHS says to "stay active and try to continue with your daily activities":² a support is no reason to sit longer, and any warning sign above comes before the log. If the ache is worst on waking, not after sitting, see our guide to lower back pain in the first hour after waking.

07What this cannot fix

A lumbar pillow cannot tell you why your back hurts. None of the studies in this guide tested our set, so nothing here says it changes your posture, your comfort or your pain.

The biggest result we found came from a seat cushion built to encourage shifts, and two of the study's authors are listed as its inventors. That result says nothing about foam behind your back.

A support cannot make a chair fit you, either: a seat too deep, a backrest that never reaches you, or long hours without getting up stay what they are.

Back pain after a serious accident, with chest pain, with bladder or bowel changes, or with pain, tingling, weakness or numbness in both legs is for emergency care. If the ache has not improved after a few weeks of caring for it at home, does not improve after resting, is worse at night, or stops your day-to-day activities, ask a health professional and bring your log.

08Which set is this?

This is our Seat cushion and lumbar set: the back piece, which needs no brackets or assembly, and a seat cushion with a center cutout shaped to lift the tailbone off the chair. Both are slow-rebound natural-rubber memory foam, not too soft and not too firm, and both covers, with airflow cutouts, unzip and wash.

It suits a chair that leaves a gap at the small of your back, once you have checked the placement and the seat edge. The back piece fills the small of your back and the seat cushion spreads your weight, and that is all the set does. It does not set up your chair, and it is not a fix for a back that hurts.

Back pain after a serious accident, with chest pain, or with pain, tingling, weakness or numbness in both legs is for emergency care; pain that does not improve after resting, or is worse at night, is for a health professional. Browse all our Office guides for more on desks and chairs.