Back Pain · April 8, 2026 · Dr. Michelle Herczeg
Lower Back Pain From Sitting All Day: Why It Happens and What to Do
Quick answer
Sitting for hours shortens the hip flexors, weakens the glutes, and loads the lumbar discs at up to 40% more pressure than standing — driving the lower back pain most desk workers feel by mid-afternoon.
What sitting does to your spine
Sitting loads your lumbar discs at roughly 140% of standing pressure. Add a forward slouch and that climbs higher. Over months, the hip flexors shorten, the glutes turn off, and the low back becomes the muscle doing the work it was never designed for.
Fix your setup in 10 minutes
- Top of monitor at eye level
- Elbows at 90°, wrists neutral
- Hips slightly higher than knees
- Lumbar support, even a rolled towel works
- Phone on a stand, not in your lap
The 5-minute desk-worker routine
- Couch stretch (hip flexors), 60 seconds each side
- Glute bridges, 10 reps
- Cat-camel, 10 reps
- Wall angels, 10 reps
- Walk for 60 seconds
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People also ask
Why does sitting cause lower back pain?
Sitting tilts the pelvis back, flattens the lumbar curve, increases disc pressure, and shortens hip flexors that pull on the low back.
What is the best sitting posture for back pain?
Hips slightly higher than knees, feet flat, screen at eye level, and a small lumbar support. But the best posture is always your next one — change positions often.
Should I get a standing desk?
A sit-stand desk is worth it. Aim for 50/50 sitting and standing throughout the day, never standing rigid for hours.