Lumbar Arthritis: Why Standing Hurts and Sitting Helps

There is a particular story we hear often enough that it has become a diagnostic clue in itself. Walking through a grocery store is miserable, but leaning on the cart makes it bearable. Standing at a counter is worse than sitting at a desk. Walking downhill is harder than walking uphill.

That pattern points squarely at the back of the lumbar spine.

A joint like any other

The facet joints at the back of each lumbar segment are true synovial joints, with cartilage surfaces and a capsule, the same basic construction as a knee. They wear the way a knee wears. Cartilage thins, the capsule thickens, bone builds up at the margins, and the joint becomes painful and stiff.

What accelerates that wear is disc height loss. As the disc in front flattens, more of the body's weight shifts onto the joints behind it. They were built to guide motion, not to carry load, and they respond to a job they were not designed for by degenerating faster.

Why position changes everything

Standing and arching backward closes the facet joints and narrows the spinal canal and nerve openings. Bending forward, sitting, or leaning on a cart opens them. That is the entire explanation for the grocery cart sign, and it is why patients with facet arthritis often prefer a stationary bike to a treadmill.

When the narrowing is significant enough to crowd the nerves, people describe heaviness, aching, or cramping in both legs that comes on after walking a predictable distance and eases within a few minutes of sitting. This is different from the sharp, single-leg pain of a disc pressing on one nerve root, and the distinction guides treatment.

What decompression does here

Non-surgical decompression puts the lumbar spine into gentle axial traction on a table designed to isolate the target segment. Cycles of pull and release separate the vertebrae slightly, which unloads the facet joints and increases the space available to the nerves.

There is a second effect worth understanding. Discs have no blood supply of their own past early adulthood. They exchange fluid and nutrients through a pumping action driven by changes in pressure, and a segment that has stopped moving loses that exchange. Cyclic traction restores a pressure gradient across the disc, which is the mechanism by which the tissue is nourished at all.

Decompression does not reverse arthritis. What it addresses is the mechanical crowding and loss of motion that make arthritis symptomatic, and that is usually the part patients actually care about.

The rest of the plan

Decompression buys space. Something has to help hold it, which is why we pair it with work on hip mobility and trunk stability. Stiff hips force the low back to supply motion it does not have, and that is a large part of why arthritic backs keep flaring.

If standing has become the hard part of your day, call (725) 255-7333. Henderson, southwest Las Vegas, and North Las Vegas.