Start With Your Chair, Not Your Desk

Most people begin an ergonomic overhaul by shopping for a new desk. In practice, your chair does far more of the heavy lifting, and getting it right costs nothing but a few minutes of adjustment. Before you measure anything else, sit down and work through these basics.

• Seat height: Adjust so your thighs are roughly parallel to the floor and your feet rest flat. If your desk then feels too low, that is a desk problem, not a chair problem.
• Seat depth: You should be able to slide two or three fingers between the back of your knee and the front edge of the seat. Any more and you will perch; any less and you will slouch.
• Back support: The curve of the backrest should meet the small of your back, not your shoulder blades. If your chair has a lumbar pad, move it up or down until it feels like gentle support rather than a prod.
• Armrests: Set them so your shoulders stay relaxed. If they stop you pulling close to the desk, either lower them or push them out of the way.

If your feet dangle once the seat is at the right height, you need a footrest. This is one of the cheapest and most overlooked bits of home office kit, and a sturdy box or a stack of thick books will do the job perfectly well.

Get Your Screen to Eye Level

Neck ache after a long day almost always traces back to a screen that is too low. The fix is simple: the top of your screen should sit at, or just slightly below, eye level when you are sitting upright. You should be looking very slightly downwards, not up and not straight ahead for hours.

Distance matters too. Aim for roughly an arm's length between your eyes and the screen, which for most people is somewhere between 50cm and 70cm. If you find yourself leaning in, the text is probably too small. Nudge the zoom up instead of your chin forward.

Laptop users have a particular problem here. You cannot raise a laptop screen to eye level and still reach the keyboard comfortably. The answer is a stand, a box, or a pile of books to lift the screen — paired with a separate keyboard and mouse. It feels like a fuss for the first afternoon and then you wonder how you ever managed without it.

Sort Out Your Keyboard and Mouse

Once your screen is right, bring your hands into line. Your keyboard should sit at roughly elbow height, with your forearms close to horizontal and your wrists straight. A slight downward slope away from you is fine; bending your wrists upwards for hours is not.

• Keep the keyboard close enough that your elbows stay by your sides rather than reaching forward.
• Place the mouse on the same surface and at the same height as the keyboard — no reaching across a pile of papers.
• Keep your grip light. If your hand aches, try a slightly larger mouse or one that lets your hand rest in a more natural position.
• Bend your elbows to around 90 degrees, and keep your shoulders down and back rather than hunched towards your ears.

If you type for most of the day, the humble wrist rest can help, but only for resting between bursts of typing. Leaning on it while you type tends to create as many problems as it solves.

Light, Glare and the Space Around You

A well-arranged desk in a badly lit corner will still leave you rubbing your eyes by mid-afternoon. Position your screen side-on to a window rather than directly in front of it or with your back to it, which turns the screen into a mirror. If overhead lighting reflects off the glass, tilt the screen a couple of degrees or move your lamp.

Keep the things you use most within easy reach — a comfortable arc of about arm's length across the desk. Anything you only touch once a day can live further away. That single rule clears most of the clutter that quietly eats into your working space.

A little floor space matters too. Give your feet somewhere to move rather than tucking them around a storage box, and leave enough room to push your chair back without hitting anything.

Small Habits That Make the Setup Work

The perfect posture held for eight hours is still a problem. Bodies like variety, so build movement into the day rather than treating your desk as something you sit at until home time.

• Follow the 20-20-20 rule: every 20 minutes, look at something roughly 20 feet away for about 20 seconds. It costs you nothing and eases tired eyes.
• Stand up regularly: at least once an hour, even if it is just to make a cup of tea or answer the door. A timer can help if you tend to disappear into your work.
• Change position deliberately: lean back for a phone call, perch forward for a tricky bit of reading, cross your ankles now and then. Variety beats rigidity.
• Recheck your setup: if you move your chair, swap desks, or borrow a monitor, the geometry changes. A two-minute reset is usually all it needs.

None of this requires an expensive overhaul. An adjustable chair, a screen at the right height, a footrest if you need one, and a habit of moving about will see off most of the aches that creep in during long working days. Set it up once, tweak it as you go, and your desk will quietly stop being something you notice at all.