Technology explained
The two words are used interchangeably in advertising, which is a problem when patients pay decompression prices for a traction bed. The distinction is mechanical, and it is easy to verify before you commit to a package.
Quick answer
Is spinal decompression the same as traction?
No. Traction applies a constant fixed pull, which triggers a protective muscle reflex that resists the stretch and limits how much the disc actually unloads. Spinal decompression is computer-controlled: it cycles between a pull phase and a rest phase, measures resistance through a feedback loop and backs off when the muscles guard, and is angled to a specific disc level identified on MRI. The result is genuine negative pressure inside the targeted disc rather than a generalised stretch of the whole spine.
When you pull steadily on a spine, the paraspinal muscles contract to protect it. That reflex cancels much of the intended force, which is why static traction often produces a stretch sensation without changing pressure inside the disc.
Decompression tables cycle the load — a pull phase followed by a partial release, repeated across the session. The cycling stays below the reflex threshold, so the muscles never fully engage, and the disc genuinely unloads.
An L5-S1 lesion, an L4-L5 lesion and a C5-C6 lesion each require a different pull angle. Decompression protocols set that angle from your MRI. A general traction bed pulls along one axis regardless of which disc is symptomatic, which is why results are inconsistent.
Manual and mechanical traction remain useful for facet-related stiffness, general mobility work and as a low-cost adjunct. The failure is using it as a substitute for decompression in a genuine contained disc lesion with radiating symptoms, and charging for the latter.
Whatever the table, the disc reloads the moment you go back to the same chair, the same lifting mechanics and the same weak deep stabilisers. The clinical value comes from the sequence: unload, control inflammation, then rebuild.
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Answers
No. Inversion uses body weight and gravity, applies an uncontrolled load, and cannot target a level. It also raises blood pressure and eye pressure, so it is unsuitable for many patients. It is a general stretch, not a clinical decompression protocol.
It should not. Most patients describe a gentle pull followed by a release, and many fall asleep during sessions. Sharp or radiating pain during a session means the angle or force needs adjusting and should be reported immediately.
Over-the-door cervical kits and inversion frames apply constant, unmeasured force and frequently aggravate an irritated nerve root. They are not equivalent and are best avoided during an acute radicular episode.
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