The ergonomics accessory market is full of posture braces, lumbar cushions, balance balls, and gadgets of dubious value. Meanwhile, the accessories with the highest genuine impact - the ones that change the actual biomechanical inputs your body is dealing with all day - are unglamorous and often overlooked.
This list is ranked by ergonomic impact: how much difference does this actually make to the mechanical load on your spine during a standard workday? Price and novelty are not factors.
1 Laptop stand (highest impact for MacBook users)
If you use a MacBook as your primary display on a desk, a laptop stand is the single highest-impact ergonomic purchase you can make. Bar none.
A laptop screen placed flat on a desk sits roughly 6–10 inches below eye level, requiring 20–40 degrees of cervical flexion to view it comfortably. At 30 degrees, that nearly quadruples the effective load on your cervical spine - from ~12 lbs to ~40 lbs. A laptop stand raises the screen to eye level, eliminating this mechanical driver for the entirety of your workday.
What to look for: Stable base, height adjustable to true eye level (many cheap stands don't go high enough), and ventilation to prevent MacBook throttling. The Nexstand K2, Rain Design mStand, and Twelve South Curve are popular choices that hit the right height range. You'll need a separate keyboard and trackpad - budget for those as part of this upgrade.
2 Monitor arm
For users on external displays, a monitor arm is the upgrade that makes everything else work better. Most monitor stands allow only limited height adjustment - often not enough to reach true eye level for taller users, or for users who want to position the monitor unusually close or at an angle.
A VESA monitor arm clamps to the desk and allows full 3D positioning: height, depth, tilt, and rotation. You can bring the monitor to precisely eye level and exactly the right distance, and adjust it in seconds when your posture or chair height changes.
What to look for: VESA 75x75 or 100x100 compatibility (check your monitor's spec sheet), gas spring or spring-balanced mechanism for easy repositioning, and a weight rating that covers your monitor. The Ergotron LX is the most widely recommended option across ergonomics communities and holds its position reliably without drift.
3 Ergonomic keyboard
Standard keyboards require your hands to be positioned with the wrists in slight ulnar deviation (angling outward) to reach the keys. Over thousands of hours of typing, this drives internal shoulder rotation and contributes to the rounded-shoulder pattern common in desk workers.
Split ergonomic keyboards allow each hand to be positioned in a more neutral alignment relative to the shoulder, reducing the internal rotation that feeds into rounded posture over time. They also typically offer tenting options that reduce forearm pronation.
What to look for: A truly split design (not just a slight curve), some degree of tenting angle, and key travel you find comfortable for your typing style. The Kinesis Freestyle, Logitech ERGO K860, and MoErgo Glove80 (for enthusiasts) are current favorites. Apple's Magic Keyboard is reasonable for occasional use but provides no wrist/shoulder benefit over a conventional keyboard.
4 Lumbar support cushion
Many desk chairs - even expensive ones - have lumbar support that either doesn't adjust to the right height or produces too much pressure. A separate lumbar cushion placed at belt level fills the gap between the lower back and the chair, maintaining the natural lumbar lordosis and preventing the pelvis from rolling backward into a slouched position.
This is a lower-cost alternative to buying a new chair when the chair itself is otherwise adequate. It directly addresses the loss of lumbar curve that causes the spine to "C-shape" during prolonged sitting, which contributes to both lower back pain and forward head posture (a flattened lumbar curve is biomechanically linked to increased cervical flexion).
What to look for: Firm enough to maintain position under your weight without bottoming out, correct depth for the distance between your lower back and the chair back. Most people find 3–4 inch depth appropriate. Avoid memory foam versions - they compress too much to provide consistent support.
5 Vertical mouse
Conventional mice require forearm pronation (turning the palm downward) to use. Sustained pronation increases the tension in the pronator teres and feeds into the internal shoulder rotation pattern. A vertical mouse holds the hand in a handshake orientation - neutral forearm rotation - which reduces this tension over hours of mousing.
The benefit is meaningful for users who experience forearm fatigue, lateral elbow tenderness (tennis elbow), or shoulder tension that's worse on their dominant side. For users without these symptoms, the benefit is less immediate but contributes to better shoulder alignment over time.
What to look for: The right size for your hand (measure your hand length and check brand sizing guides), a wrist rest or stand that positions the arm correctly, and a shape that feels comfortable in the handshake grip. Logitech MX Vertical and Anker Vertical Mouse are widely available starting options.
Hardware sets the stage. Posture monitoring closes the loop. SitTall - Fix Your Posture uses your AirPods to detect head position drift during the workday - the active layer that works with, not instead of, your ergonomic setup.
Download SitTall - Fix Your Posture for Mac6 Anti-fatigue mat (for standing desk users)
If you use a sit-stand desk, an anti-fatigue mat is the accessory that makes sustained standing actually comfortable. These mats have a slightly unstable, cushioned surface that prompts the small muscles of the feet and lower legs to make micro-adjustments continuously - reducing the static muscle loading that makes prolonged standing uncomfortable and harmful.
Without a mat, most people find they stand rigidly and shift their weight onto one leg - a posture that creates asymmetric loading up the kinetic chain. With a mat, movement is encouraged naturally and standing intervals are significantly more sustainable.
7 Footrest
A footrest is useful when your desk height is fixed and your ideal typing position (elbows at 90 degrees, forearms parallel to floor) results in your feet not reaching the ground comfortably. Dangling feet cut off circulation behind the knees and create subtle traction on the lower back.
For most users with adjustable chairs, a footrest isn't necessary. For users at fixed-height desks, co-working spaces, or anyone shorter than average, it's a cheap and effective solution.
What not to buy
Posture-correcting wearables that strap to your back and vibrate when you slouch have consistently poor outcomes in behavioral research - the vibration becomes background noise within days. Back braces worn during desk work weaken the muscles they're supposed to be supporting, creating dependence. Balance ball chairs produce novelty interest but no durable postural benefit in controlled studies.
The items above address actual mechanical inputs. Everything else is largely theater.