Office ergonomics is the practice of designing your workspace to fit your body, rather than forcing your body to adapt to the workspace. It covers everything from chair height and monitor distance to lighting and how often you stand up. The goal is straightforward: reduce the physical strain that builds up over hours of desk work, which over time can cause soft tissue injuries known as musculoskeletal disorders, or MSDs.
Most people encounter office ergonomics after something starts hurting. A stiff neck, sore wrists, lower back pain that gets worse by Friday. These aren’t random aches. They’re the predictable result of spending hours in positions your body wasn’t built to hold. The good news is that most of these problems respond well to relatively simple workspace adjustments.
Why Your Setup Matters
OSHA defines ergonomics as “the study of fitting workplace conditions to the working population.” In an office context, that means arranging your desk, chair, screen, keyboard, and lighting so they support your body’s natural posture rather than working against it. The risk factors that cause problems are specific: awkward postures, repetitive movements, forceful exertion, and sustained contact stress on areas like your wrists or elbows. Routine exposure to these for several hours a day is what leads to injury.
The injuries themselves tend to develop gradually. Carpal tunnel syndrome, tendinitis, chronic neck and back pain, and eye strain are among the most common. They’re also among the most preventable workplace injuries, because the fixes are mechanical. Change the angle, change the height, change the habit, and the strain goes away.
Setting Up Your Chair
Your chair is the foundation of a good workstation because it determines the alignment of everything else. The backrest should be adjusted forward, backward, up, and down until it fits snugly into the hollow of your lower back. This supports the natural S-curve of your spine, which is the position that puts the least stress on your spinal discs and surrounding muscles. A chair without proper lumbar support forces those muscles to do the work of holding your torso upright all day, which is why your back aches after long stretches at a desk.
Seat height should allow your feet to rest flat on the floor with your thighs roughly parallel to it. If the chair is too high and your feet dangle, pressure builds under your thighs and reduces circulation. If it’s too low, your hips drop below your knees and your lower back rounds forward. A footrest can help if you can’t get the chair low enough while still keeping your arms at the right height for your desk.
Keyboard, Mouse, and Wrist Position
The single most important rule for typing is to keep your wrists straight. When using a keyboard and mouse, your upper arms should hang relaxed at your sides, your elbows bent at about 90 degrees, and your wrists in a neutral position, not angled up, down, or to either side. This neutral alignment keeps the tendons in your forearm from being compressed or stretched repeatedly, which is the mechanism behind most repetitive strain injuries in office workers.
Your keyboard and mouse should sit at a height that lets you maintain this position without shrugging your shoulders or reaching forward. For many people, this means the keyboard tray or desk surface is slightly below elbow height. The mouse should be right next to the keyboard on the same surface, not off to the side or on a higher plane. Reaching even a few inches for your mouse thousands of times a day adds up.
Monitor Height and Distance
Your eyes naturally settle into a slightly downward gaze when relaxed, roughly 15 degrees below the horizontal. That’s why the top of your monitor should sit at or just below eye level. This places the center of the screen in the zone where your eyes are most comfortable, about 15 to 30 degrees below horizontal. Looking upward, even slightly above the horizontal line, is consistently reported as tiring and contributes to neck strain because you tend to tilt your head back to compensate.
For distance, an arm’s length (roughly 50 to 70 cm, or 20 to 28 inches) is a reliable starting point. The natural resting focus of your eyes sits at about 80 cm, or around 31.5 inches, and tends to increase with age. If the screen looks blurry at arm’s length, increase the font size or display scaling rather than pulling the monitor closer. Forcing a shorter viewing distance increases eye strain. If you wear bifocals or progressive lenses, you may find it more comfortable to lower the monitor a bit further, since the reading portion of the lens sits lower and a screen that’s too high will have you tilting your chin up to see through it.
Wide or portrait-oriented monitors introduce additional considerations. With a large widescreen display, you may need to push it further back so you’re not turning your neck to read content at the edges. With a tall portrait display, make sure the top of the screen doesn’t rise above eye level.
Lighting and Glare
Poor lighting is one of the most overlooked ergonomic problems. For typical computer work, office lighting should fall between 20 and 50 foot-candles. If you’re using an LCD monitor (which most people are now), you can go higher, up to about 73 foot-candles, since LCDs handle ambient light better than older screens.
Glare is a bigger issue than brightness for most people. The fix is positioning: your monitor should face at right angles to windows and overhead light sources. If a bright window is directly behind you, it creates glare on the screen. If it’s directly in front of you, you’re staring into the light source itself. Placing windows to your side eliminates both problems. Blinds, anti-glare screen filters, and adjusting your monitor’s brightness to match the room can handle whatever glare remains.
The 20-20-20 Rule for Eye Strain
Even with a perfectly positioned screen, staring at it for hours fatigues your eyes. The 20-20-20 rule is a simple countermeasure recommended by the Mayo Clinic: every 20 minutes, look at something 20 feet away for at least 20 seconds. This gives the focusing muscles inside your eyes a chance to relax. It won’t prevent serious eye conditions, but it significantly reduces the headaches, dry eyes, and blurred vision that fall under computer vision syndrome.
Sitting, Standing, and Moving
Sitting all day is a problem. Standing all day is also a problem. The solution is alternating between the two. Research from Griffith University and the University of Queensland found that a structured ratio of 30 minutes sitting to 15 minutes standing reduced lower back pain after three months. Participants who followed this fixed 30:15 schedule stuck to it more consistently than those who chose their own ratio, and they reported additional benefits including lower stress and better concentration. The researchers attributed the stronger results partly to the routine itself: having a clear, simple schedule made the habit easier to maintain.
If you don’t have a sit-stand desk, the same principle applies in a simpler form. Get up and move for a few minutes every half hour. Walk to a coworker’s desk, refill your water, or just stand and stretch. The movement itself matters more than the specific activity. Prolonged static posture, whether sitting or standing, is what causes stiffness and pain.
Laptop Workstations Need Extra Gear
Laptops are inherently bad for ergonomics because the screen and keyboard are attached. If the screen is at the right height, the keyboard is too high. If the keyboard is at the right height, the screen is too low. There is no position where both are correct simultaneously.
The Mayo Clinic recommends treating a laptop like a desktop when you’re using it at a desk: get a laptop stand or riser to bring the screen up to eye level, then plug in an external keyboard and mouse that you can position at the correct height for your arms. This costs relatively little compared to dealing with chronic neck or wrist pain. If you only use your laptop occasionally at a desk, this may feel like overkill, but if it’s your primary workstation for hours each day, it’s one of the most impactful changes you can make.
Putting It All Together
A well-set-up workstation isn’t one single adjustment. It’s a chain where each link affects the next. Your chair height determines your arm position, which determines your desk or keyboard tray height, which determines your monitor distance. Change one and you may need to tweak the others. The easiest approach is to start from the chair (get your feet flat and your back supported), then set your keyboard and mouse height (elbows at 90 degrees, wrists straight), then position your monitor (top of screen at or just below eye level, about an arm’s length away), and finally address lighting and glare.
None of this requires expensive equipment. A stack of books under a monitor, a rolled towel behind your lower back, or a cardboard box as a footrest can solve many problems. What matters is the position your body ends up in, not the price of the furniture that gets you there.