How to Sit at a Desk: A Practical, Adjustable Setup

Start from the floor

Sit back in the chair and place both feet on the floor or on a stable footrest. If the chair is raised to match the desk but your feet dangle, add foot support instead of perching at the front edge. The backrest should support you without pushing your shoulders forward.

Leave enough room behind the knees and avoid pressure from the seat edge. Exact angles vary with the person and task, so use published angle ranges as starting points rather than rules you must hold all day.

Bring the work toward you

Place the keyboard and mouse on the same surface and close to the body. Relax the shoulders and keep the wrists in a neutral, unforced position. Frequently used objects should be within easy reach; repeated reaching can gradually pull the torso forward or twist it to one side.

If the desk is too high, raising the chair and adding a footrest is usually more workable than lifting the shoulders. If it is too low and cannot be adjusted, avoid compensating by folding the upper body over the work surface.

Position the screen for the task

Center the main display in front of the body. Set its distance so ordinary text is readable without leaning in; increasing text size is often better than moving the face toward the screen. The top of the visible display is commonly at or a little below eye level, but glasses, screen size, and the task may justify a different position.

For two displays used equally, center the gap between them. If one display is primary, keep it centered and place the secondary display beside it. A laptop used for long periods benefits from an external keyboard and mouse so the screen and hands can be positioned independently.

Use a 60-second reset

When you notice yourself drifting, do not overcorrect. Put the feet back on their support, let the backrest take your weight, bring the chin back only enough to stack the head comfortably, and let the shoulders drop. Then confirm that the screen and input devices are still in the right places.

If you return to the same strained position within minutes, the workstation or task is probably driving it. Change the environment, alternate the task, or take a movement break rather than relying on willpower.

• Feet supported and body weight carried by the seat and backrest.
• Shoulders relaxed, elbows close, and input devices within easy reach.
• Primary work centered so the head and torso do not stay rotated.
• Text large enough to read without leaning toward the display.

Make variation part of the setup

No arrangement removes the need to move. Change position, stand for some tasks if that is comfortable, walk during natural breaks, and look away from the screen. A setup succeeds when it supports work and makes variation easy, not when it locks you into a diagram-perfect pose.

Frequently asked questions

Sources and further reading

We use primary public-health, workplace-safety, and web-platform documentation where possible. Sources inform the guide; they do not endorse SitAligned.

• Computer workstation evaluation checklist U.S. Occupational Safety and Health Administration
• Office ergonomics guidance Canadian Centre for Occupational Health and Safety