Inversion tables can provide short-term relief for certain types of lower back pain, but the evidence is mixed and major medical guidelines don’t recommend traction therapy as a go-to treatment. The most promising research involves disc-related pain with sciatica, where inversion therapy combined with physical therapy helped some patients avoid surgery. For general low back pain without nerve involvement, the benefits are less clear.
How Inversion Tables Work on Your Spine
When you tilt back on an inversion table, gravity pulls your body weight downward and creates a stretching force along your spine. This can widen the space between vertebrae by up to 4 millimeters at each disc level, primarily in the lower lumbar spine (the L3/4 and L4/5 segments where most disc problems occur). The idea is that this separation, called distraction, takes pressure off compressed discs and pinched nerves.
The pressure reduction inside your discs depends on how far you tilt. Research shows that a traction load equal to about 60% of your body weight is needed to reduce internal disc pressure by 25%. That’s a meaningful change, and it explains why some people feel immediate relief during a session. The key question is whether that relief lasts once you stand back up.
What the Research Actually Shows
The strongest evidence for inversion therapy comes from a pilot trial involving patients with disc herniations causing sciatica (pain radiating down the leg). Patients were split into two groups: one received standard physical therapy alone, and the other received physical therapy plus inversion table sessions. Among those using inversion, 77% avoided the surgery they had been scheduled for. In the physical therapy-only group, just 22% avoided surgery. That’s a striking difference.
The inversion group also saw a 12-point improvement on the Oswestry Disability Index, a standard measure of how much back pain limits daily activities. However, other outcome measures in the study, including pain scores, MRI appearance, and general quality-of-life ratings, didn’t show significant differences between the two groups. This suggests that inversion therapy may help resolve nerve compression enough to cancel surgery without necessarily outperforming physical therapy on every measure of pain and function.
It’s worth noting this was a small study of 24 patients, all with single-level disc herniations. Larger trials haven’t been completed. For people with general lower back pain that isn’t caused by a herniated disc pressing on a nerve, the picture is less encouraging.
What Medical Guidelines Say
The American College of Physicians, which publishes the most widely referenced clinical guidelines for back pain treatment in the U.S., does not recommend traction (including inversion) for acute, subacute, or chronic low back pain. For acute and subacute pain, they found the evidence insufficient to determine whether traction works at all. For chronic pain, low-quality evidence showed no clear advantage of traction over other active treatments like exercise, spinal manipulation, or physical therapy. Even for radicular pain (sciatica), the guideline found no clear differences between traction and other approaches.
This doesn’t mean inversion therapy is useless. It means the overall body of evidence hasn’t been strong enough to earn it a formal recommendation alongside treatments like exercise, massage, or spinal manipulation, which have more consistent support.
Who Might Benefit Most
Based on the available evidence, inversion therapy is most likely to help if you have a confirmed disc herniation at a single level that’s causing nerve compression and leg symptoms. In this scenario, using an inversion table alongside a physical therapy program may reduce the likelihood of needing surgery. For general muscle-related low back pain or age-related degenerative changes without nerve involvement, there’s no strong evidence that inversion works better than staying active, stretching, or doing core-strengthening exercises.
People with chronic low back stiffness sometimes report that inversion feels good in the moment, similar to how a deep stretch provides temporary relief. That subjective benefit is real, but it typically doesn’t translate into lasting structural changes.
How to Use an Inversion Table Safely
If you decide to try inversion therapy, the angle and duration matter more than most people realize. Clinicians at Marshfield Clinic recommend limiting yourself to a 30- to 35-degree angle. Older adults should stay between 10 and 15 degrees. Full inversion (hanging completely upside down) is unnecessary for spinal decompression and significantly increases the risks.
Start with just one to two minutes per session, once a day. Over time, you can gradually work up to five minutes per session, twice daily. Rushing this progression is a common mistake that leads to muscle soreness, dizziness, and headaches. If you’re over 80 or have balance concerns, starting at 5 to 10 degrees for two to three minutes is a safer entry point.
Who Should Avoid Inversion Tables
Going upside down, even partially, dramatically increases pressure inside your eyes. In healthy eyes, intraocular pressure nearly doubles after just five minutes of inversion, jumping from about 17 mmHg to 33 mmHg. In people with glaucoma, it rises from about 21 mmHg to nearly 38 mmHg. These are significant spikes that could worsen eye conditions. Anyone with glaucoma or ocular hypertension should not use an inversion table.
Inversion also raises blood pressure and heart rate temporarily. People with uncontrolled high blood pressure, heart disease, or a history of stroke should avoid it. The same applies to anyone with a hiatal hernia, ear infections, or recent eye surgery. Pregnancy is another clear contraindication. If you have spinal instability, fractures, or severe osteoporosis, the traction forces could cause harm rather than relief.
Inversion Tables vs. Other Options
For most types of lower back pain, exercise-based approaches have stronger and more consistent evidence. Walking, core stabilization exercises, yoga, and physical therapy all appear in clinical guidelines as recommended treatments. Spinal manipulation and massage also have moderate support for short-term pain relief.
An inversion table isn’t a replacement for these approaches, but it could serve as one piece of a broader plan, particularly if you’re dealing with disc-related symptoms and want to try conservative options before considering surgery. Using it in combination with physical therapy, rather than on its own, is where the research shows the most promise.