How to Set Up an Office Chair for Lower-Back Support

If your chair isn't feeling comfortable, a few minutes exploring its existing adjustments may be a useful place to start. A backrest can feel wrong simply because the seat is too high, the screen is too low or the chair is parked too far from the desk. Those adjustments can matter just as much as extra padding.

Check your feet and seat height

Sit with your feet supported and your legs in a relaxed position. If the chair needs to be high enough to work at your keyboard but your feet are left hanging, a suitable footrest may be more useful than another cushion. Check that the seat edge is not pressing into the backs of your knees.

Then move closer to the desk, keeping room for your knees. A backrest position you can comfortably use may help you avoid leaning forwards throughout the morning.

Adjust the backrest

The Health and Safety Executive's DSE posture guidance says a seat back should provide good lower-back support and notes that a cushion can be used for additional support. That makes a cushion one option, not an instruction to use one on every chair.

If there is a gap behind your lower back, try the chair's built-in lumbar adjustment first. If that is not enough, try a small support or rolled towel briefly to get a sense of how much contact you prefer. Too much bulk can push you towards the front of the seat.

Check screen and keyboard reach

Sit back normally and look at the screen. If you must lean forwards to read, adjust the screen rather than trying to hold a strained position. Keep your keyboard and mouse close enough that you are not reaching across the desk. A perfectly adjusted backrest is of limited use when the rest of the setup pulls you away from it.

Five checks before you get back to work

• Feet rest comfortably on the floor or a suitable footrest.
• The seat supports your thighs without digging behind your knees.
• The backrest or lumbar area makes comfortable contact without forcing an exaggerated arch.
• Keyboard, mouse and screen can be used without repeatedly leaning forwards.
• You can get up and change activity regularly.

Understanding lumbar-support research

In a small 28-person lumbar-pillow study, a pillow modestly changed average seated lumbar posture but did not significantly improve reported comfort. A systematic review of chair interventions also found limited and conflicting evidence for pain outcomes. These studies examined other seating designs.

The practical question is whether extra contact feels comfortable in your particular chair, while keeping expectations about health benefits realistic.

If the backrest still feels uncomfortable

If you've already checked the basics and your backrest still feels sparse, our office chair back support page explains the shape and adjustment of the Lasting Comfort cushion. Compare its measurements with your chair before considering it; its adjustable padding is designed for everyday seated comfort.

Sources reviewed October 2026. General seating guidance; seek individual advice for persistent symptoms.