Tilt with Adjustable Tilt Tension
Once the tilt is positioned to unlock, pressure is relieved from the pin or lock bar by reclining back a few degrees. The tilt lock is applied to lock tilt totally if the chair is in the upright position.
Lumbar Support Adjustment
One of the most important factors in choosing an ergonomic chair is the adjustable lumbar support.
These chairs are extremely helpful for people who spend the majority of their work day at a desk. People who perform most of their tasks on a computer can especially benefit from chairs that provide proper support for their backs.
The lumbar support should fit right in the natural curve of your spine, typically at the small of your back directly above your belt line. This adjustment is often built into the chair so you can adjust both the height of the chair back and the lumbar support simultaneously. In some chairs, it's an independent adjustment.
Seat Pan Depth Adjustment
A seat pan with a sliding mechanism is a beneficial feature. This allows short and tall users to adjust the distance of the seat pan from the backrest. A person of smaller stature who sits on a long seat pan will experience pressure behind the knees, or will not benefit from the chair’s back support if he sits on the edge of the chair. A person of larger stature who sits on a short seat-pan length will have inadequate support of the thighs causing higher contact pressure
Armrest height is one of the most common ergonomic chair adjustments. The armrest adjustment can help with upper back. This is usually controlled by a push of a button or a simple knob, allowing to tilt the armrests inward or outward to varying degrees until you find the position which is adjusted to your level of comfort. The chair armrests are adjustable in 1D, 2D, 3and 4D which allows sitting close and working with arms relaxed.
Headrest adjustments provide support and comfort to the head and neck while in a reclined position, often keeping the head at a near-constant eye level with your computer monitor. The headrests are usually adjustable in height and angle to ensure the head is centered on the neck and not leaning forward.