An inversion table is a padded table that pivots on a frame, allowing you to hang at a decline or fully upside down with your ankles secured. The goal is to use gravity to gently stretch your spine, creating space between compressed vertebrae and relieving pressure on discs and nerves. People use them primarily for chronic low back pain, sciatica, and muscle spasms.
How an Inversion Table Works
When you stand upright all day, gravity compresses the discs between your vertebrae. These discs act as shock absorbers, and over time they lose height and press on nearby nerves. An inversion table reverses that equation. You strap your ankles into padded clamps at one end, then lean back until the table tilts you to your chosen angle. Your body weight now pulls your spine in the opposite direction, creating a gentle traction force that separates the vertebrae slightly.
This process is sometimes called spinal decompression. As the space between vertebrae opens up, pressure on bulging or herniated discs decreases. Fluid and nutrients can flow more easily into the disc material, and pinched nerves get some breathing room. The FDA classifies inversion tables as Class I nonpowered orthopedic traction devices, the same broad regulatory category as other basic traction equipment.
Conditions People Use Them For
The most common reasons people try inversion therapy are chronic low back pain, compressed spinal discs, sciatica (pain radiating down the leg from a pinched nerve), and muscle spasms. Some users also try them for scoliosis-related discomfort, though the evidence for that application is thinner.
The strongest research support comes from people with lumbar disc disease. A comparative study published in the Journal of Physical Therapy Science looked at patients with single-level disc herniations who were candidates for surgery. Those who received inversion therapy had reduced symptoms and a lower rate of eventually needing surgery compared to matched controls from the same neurosurgery unit who did not use inversion. The same research group had previously found positive results in a smaller randomized controlled trial of patients with lumbar disc protrusions. These are encouraging findings, though researchers note the evidence base is still limited and larger trials would strengthen the case.
What the Research Actually Shows
Inversion therapy has a surprisingly long history. Hippocrates reportedly used a form of it roughly 2,400 years ago for spinal disorders. Modern research has been more cautious in its conclusions. The existing studies suggest real symptom relief for specific conditions, particularly disc-related sciatica, but most trials have been small. The therapy appears to work best as part of a broader pain management plan rather than as a standalone cure.
What’s notable is that inversion therapy may help some people avoid or delay spinal surgery. In the Journal of Physical Therapy Science study, patients with confirmed disc herniations who used inversion therapy were less likely to proceed to surgery than comparable patients managed through a standard neurosurgery pathway. That’s a meaningful finding for someone weighing their options after a disc diagnosis.
How to Use One Safely
If you’re new to inversion, the key principle is to start conservatively. Experts at Marshfield Clinic recommend beginning at a 30- to 35-degree angle for most adults. Older adults should start even more gently, at a 10- to 15-degree angle. You do not need to go fully upside down to get benefits, and most people never should.
For time, start with just one to two minutes per session, once a day. Gradually work your way up to about five minutes per session, twice a day. Rushing the process can cause muscle soreness, dizziness, or a spike in blood pressure. Most inversion tables have a strap or tether that limits the maximum angle, which is worth setting before your first use.
Lock the ankle clamps snugly but not painfully. Wear shoes or thick socks to protect your ankles. Having someone nearby during your first few sessions is a practical safety measure, since returning to upright can feel disorienting until you learn the body mechanics of shifting your weight on the table.
Who Should Not Use an Inversion Table
Inversion isn’t safe for everyone, and some of the risks are serious enough to rule it out entirely for certain people.
The biggest concern is what happens to pressure inside your eyes. A study measuring intraocular pressure found that just five minutes of inversion nearly doubled eye pressure in healthy subjects, jumping from about 17 mmHg while sitting to roughly 33 mmHg inverted. In people with glaucoma, the increase was even steeper, rising from about 21 mmHg to nearly 38 mmHg. That kind of pressure spike can damage the optic nerve. If you have glaucoma or ocular hypertension, inversion tables are not recommended.
The same gravitational shift that decompresses your spine also sends blood toward your head, raising blood pressure in your upper body. This makes inversion risky for people with uncontrolled high blood pressure, heart disease, or a history of stroke. Other conditions that generally rule out inversion include:
- Ear infections or inner ear disorders, since the positional change can worsen vertigo and disorientation
- Pregnancy, due to the pressure changes and fall risk
- Bone weakness conditions like osteoporosis, where traction forces could cause fractures
- Spinal injuries or recent spinal surgery, where traction could worsen instability
What to Expect From Regular Use
People who benefit from inversion therapy typically notice gradual improvement over weeks rather than instant relief. Some users feel a pleasant stretch and temporary pain reduction after their first session, but lasting changes in disc pressure and muscle tension take consistent use. Think of it more like a stretching routine than a one-time fix.
The relief tends to be temporary at first, lasting a few hours after each session, then gradually extending as the surrounding muscles relax and adapt. Many physical therapists suggest combining inversion with core strengthening exercises, since a stronger core helps maintain the spinal alignment that inversion promotes.
Not everyone responds to inversion therapy, and some people find it uncomfortable regardless of angle or duration. If your pain increases during or after sessions rather than decreasing, that’s a clear signal to stop. Inversion works best for compression-related problems. If your back pain stems from muscle strain, joint inflammation, or spinal instability rather than disc compression, the mechanism doesn’t address the underlying issue and could potentially make things worse.
Choosing an Inversion Table
Inversion tables range from about $100 to $500. The main differences between models come down to build quality, weight capacity, ankle comfort, and how smoothly the table rotates. Look for a table rated for at least your body weight plus 50 pounds, since momentum during tilting adds force beyond your static weight. Padded ankle clamps with a foam or gel lining make a significant comfort difference during longer sessions.
A height adjustment feature is essential so the pivot point sits at the right place relative to your center of gravity. Tables with a long tether strap let you set a maximum angle and prevent accidentally going further than intended. Some higher-end models include lumbar support pads or heat elements, though these are comfort features rather than necessities. The most important safety feature is a solid, wide base that won’t tip on an uneven floor.