Workspace Ergonomics Essentials

Musculoskeletal disorders (MSDs) account for roughly one-third of all workplace injuries, and most are preventable through proper workstation setup. This guide covers the fundamentals backed by OSHA and ANSI/HFES 100 standards.

The Neutral Posture

Every ergonomic recommendation traces back to one principle: neutral posture. This means joints are naturally aligned, muscles are relaxed, and there's minimal stress on tendons and nerves.

Feet — Flat on the floor or a footrest. Thighs parallel to the floor. If you're short, a footrest is essential, not optional.
Back — Lumbar support touching the small of your back. Slight recline (100-110°) reduces disc pressure compared to sitting bolt upright at 90°.
Arms — Elbows at 90-110°, close to the body. Forearms parallel to the floor. Wrists straight (not bent up, down, or to the side).
Eyes — Top of the monitor at or slightly below eye level. Screen 20-26 inches from your eyes. For bifocal wearers, the monitor should be lower — 15-20° below horizontal gaze.

Chair Setup (5-Point Adjustment)

Seat height — Adjust so feet are flat on the floor and thighs are parallel to it. If the desk is too high for this, raise the chair and add a footrest.
Seat depth — Leave 2-3 fingers of space between the front edge of the seat pan and the back of your knees. Too deep compresses the backs of the legs and restricts blood flow.
Lumbar support — Position the lumbar pad at the small of your back (L3-L5 vertebrae). It should feel supportive, not pushy.
Armrest height — Elbows rest lightly on the armrests at 90° without shrugging or reaching. Armrests that are too high cause shoulder tension; too low cause leaning.
Tilt tension — Adjust so you can recline with light pressure but the chair doesn't dump you backward. Unlocked recline throughout the day is healthier than locking upright.

Monitor Placement

Single monitor — Centered directly in front of you. No twisting.
Dual monitors — If used equally, place the seam at your midline and angle both inward. If one is primary, center the primary and place the secondary to the side of your dominant eye.
Laptop users — A laptop on a desk forces you to look down 30-40°. Use a laptop stand to raise the screen and an external keyboard/mouse. This single change eliminates the most common laptop-related neck strain.
Glare — Position monitors perpendicular to windows, not facing them or with windows behind. Matte screen finishes reduce glare compared to glossy.

Keyboard and Mouse

Keyboard position — At or slightly below elbow height. A negative-tilt keyboard tray (front edge higher than back) promotes a neutral wrist position.
Mouse placement — Immediately beside the keyboard, at the same height. Reaching for a mouse placed too far right is the most common cause of right-shoulder strain in office workers.
Wrist rests — Rest the heel of the palm, not the wrist itself. And only rest when pausing — actively typing on a wrist rest can increase carpal tunnel pressure.

Sit-Stand Desks: Best Practices

Ratio — Research suggests a 1:1 to 1:3 standing-to-sitting ratio. Start with 15-30 minutes standing per hour and adjust based on comfort.
Anti-fatigue mat — Essential for hard floors. A good mat has beveled edges (trip prevention) and ¾" to 1" thickness.
Footwear — Supportive shoes matter when standing. Avoid standing in heels or completely flat shoes without arch support.
Monitor height — Must be re-adjusted when transitioning from sitting to standing. Monitor arms with gas springs make this effortless.

The 20-20-20 Rule and Movement

Every 20 minutes, look at something 20 feet away for 20 seconds. This reduces eye strain from sustained near-focus. Beyond that, stand or walk for at least 2 minutes every 30 minutes — even a walk to the water cooler counts. Prolonged static posture, whether sitting or standing, is the real enemy.

For workstation-specific calculations and recommendations, try our Desk Setup Evaluator tool.