Workstation Ergonomics: Setting Up a Desk to Fit the Person

If your neck aches by mid-afternoon or your wrists feel sore after a long day of typing, it is natural to wonder whether your desk is to blame. Sometimes it is, partly. This page covers the set-up principles that public health and safety bodies publish for a desk, chair, screen, keyboard and mouse, why changing position matters as much as the position itself, how a workstation assessment works, and what the whole exercise can and cannot promise. It is general education, not advice about your own body. For problems that are already affecting the hand and arm, see hand, wrist and upper-limb rehabilitation.

The idea behind it: neutral posture

The US Occupational Safety and Health Administration (OSHA) describes neutral body positioning as a comfortable working posture in which your joints are naturally aligned, and says that working this way reduces stress and strain on muscles, tendons and the skeletal system. Its list is specific: hands, wrists and forearms straight, in line and roughly parallel to the floor; shoulders relaxed with the upper arms hanging normally; elbows close to the body and bent between 90 and 120 degrees; feet fully supported by the floor or a footrest; and the back supported, with the thighs and hips generally parallel to the floor.

Every item on that list is a joint kept away from its extremes. That is the logic behind most of the advice that follows.

Chair and desk

Mayo Clinic's office ergonomics guide suggests a chair that supports your spine, adjusted so that your feet rest flat on the floor, or on a footrest so that your thighs are parallel to the floor. If the chair has armrests, they should let your arms rest gently with elbows close to the body and shoulders relaxed.

For the desk, Mayo advises leaving enough room under it for your legs and feet and not storing items there. If the desk is too low and cannot be adjusted, it suggests putting sturdy boards or blocks under the legs; if it is too high, raise the chair and use a footrest. A hard desk edge can be padded, or a wrist rest used, to avoid what it calls contact stress on the wrists. Frequently used objects such as the phone or printed materials should sit close to the body to minimize reaching, and anything you cannot comfortably reach while seated is a reason to stand up and get it.

Screen

Mayo places the monitor straight in front of you, directly behind the keyboard, about an arm's length from your face. It gives a range: no closer than 20 inches (about 50 centimeters) and no further than 40 inches (about 100 centimeters). The top of the screen should be at or slightly below eye level, and people who wear bifocals are advised to lower the monitor a further 1 to 2 inches (about 2 to 5 centimeters).

Laptops are a special case. Mayo notes that the low screen height and cramped keyboard and touchpad can lead to discomfort, and suggests an external keyboard and mouse plus a laptop stand to approximate a desktop arrangement.

Keyboard, mouse and phone

Mayo advises putting the keyboard in front of you so that wrists and forearms are in line and shoulders relaxed, and placing the mouse within easy reach on the same surface. While typing or using a pointer, keep the wrists straight, the upper arms close to the body and the hands at or slightly below elbow level. Setting the mouse sensitivity so that a light touch works is a further small adjustment it recommends. For long phone calls, a speaker or headset is preferable to cradling the phone between head and neck.

Vary your posture

A good set-up does not make sitting still safe. OSHA states plainly that, regardless of how good your working posture is, working in the same posture or sitting still for prolonged periods is not healthy. It recommends changing position frequently, and it names four reference postures that all provide neutral positioning: upright sitting, standing, declined sitting (thighs sloping down, hips higher than the knees) and reclined sitting (torso and neck straight and reclined between 105 and 120 degrees from the thighs).

The practical advice from OSHA and Mayo overlaps:

• Make small adjustments to the chair or backrest during the day.
• Stretch the fingers, hands, arms and torso.
• Stand and walk around for a few minutes periodically.
• Do some tasks standing, such as phone calls or reading, if you can.

Neither source sets a strict break schedule. Fatigue and pacing are discussed more broadly in energy conservation and fatigue.

How a workstation is assessed

In Great Britain, the Health and Safety Executive (HSE) explains that employers must protect workers from the health risks of display screen equipment, and that the regulations apply to workers who use such equipment daily, for continuous periods of an hour or more. HSE's assessment guidance says the employer should look at the whole workstation, including equipment, furniture and work conditions, plus the job being done and any special requirements of the person, for example a user with a disability. An assessment is also required when a new workstation is set up, a new user starts, the workstation or the way it is used changes, or users complain of pain or discomfort.

HSE adds that assessment software can help train users and let them take part, but is not an assessment on its own: a trained assessor should review the results, clear up doubtful points, give feedback and make sure problems are put right. These are British legal duties, and other countries' rules differ. HSE's overview page says the law covers fixed workstations, mobile workers and home workers.

Which professional performs an assessment varies. The American Society of Hand Therapists (ASHT) says a hand therapist can act as a consultant in the industrial world, training employees and recommending modifications of workstations and alternative work methods. Hand therapists are occupational or physical therapists; the wider profession is explained in what occupational therapy is and who it helps. In HSE's description, an assessment covers the person, the job and the equipment together, not the furniture alone.

Who it helps, and what it cannot promise

HSE says incorrect use of display screen equipment, or poorly designed workstations or work environments, can lead to pain in the neck, shoulders, back, arms, wrists and hands as well as fatigue and eye strain, and adds that the causes may not always be obvious. That sentence also marks the limit. Mayo says that with proper office ergonomics you may be able to avoid some of the health problems associated with seated work. That wording is about reducing risk, not guaranteeing relief, and pain has many contributors that a chair and monitor cannot reach.

The changes are most relevant to people who spend long unbroken periods at a screen and to those returning to work after a hand or arm injury, where a therapist may suggest workstation changes as part of recovery. Numbness, tingling or persistent pain is a reason to see a doctor, and a desk adjustment is not a substitute for that.

This page draws on US and British sources, and standards differ by country and person. Your own therapist, doctor or workplace assessor has the final word.

The short version

A desk set-up built around neutral joints, with a supported back, feet on the floor, a screen at arm's length and straight wrists, removes common strain. Changing position and moving regularly matter as much as the arrangement. Ergonomics lowers risk without guaranteeing relief, so symptoms that persist are a reason to see a doctor or therapist.