Most of us know that feeling at the end of a long work day. You stand up from your desk, and your lower back feels tight, maybe a bit sore. You shrug it off and get on with your evening.
That stiffness is not just in your head. A study in the Spine Journal found that lumbar spine stiffness measurably increased in men after just one hour of continuous sitting. The lower back tightened well before the two-hour trial was over.
According to the World Health Organization, low back pain is the single leading cause of disability in the world and affected roughly 619 million people in 2020. For most people, a desk is where the trouble builds up.
What an hour of sitting does to the spine
When you sit for a long stretch, the deep muscles that normally brace the spine quiet down.
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The lower back then leans on its ligaments and discs for support, and pressure inside the discs climbs.
A modeling study in Bioengineering pushed this further. Slumped sitting and sitting on the floor both raised pressure on the lumbar discs and the bones in the lower back well above standing levels.
Keeping an upright posture with the natural inward curve of the lower back kept the strain much closer to what the spine feels when standing.
The problem is that most people slump within minutes of sitting down, often without noticing.
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How often to stand up from your desk
UCLA Health recommends standing, stretching or walking for at least a minute or two every half hour.
Even a well-fitted chair cannot cancel out the static load of staying still.
These short breaks give the deep core muscles a chance to switch back on, let the discs decompress for a moment, and reset your posture before you sit back down.
Three moves that help undo sitting damage
A handful of simple moves can also help. The bird dog, done on all fours by extending one arm and the opposite leg, trains the deep muscles that stabilize the spine.
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The dead bug, done on your back while slowly lowering alternating arm and leg, works the same stabilizers without loading the discs.
A hip flexor stretch opens up the muscles at the front of the hip, which shorten from hours of sitting.
There are more options in our rundown of five simple exercises to help your body recover from years of sitting.
If a desk fills most of your workday, set a timer. Every 30 minutes, stand up, walk a short distance, and move your spine through its full range before you sit back down.
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This article is made and published by Mie Hermansen, who may have used AI in the preparation.