Adjust the office chair correctly: How to sit comfortably in 6 steps

Correctly adjusting an office chair means systematically adjusting it to your body from bottom to top: first the Seat height, then this Seat depth, then the Lumbar support, the Backrest counter pressure and finally the Armrests. Only in this order does the chair actually support the spine in its natural shape - and that is exactly the basic requirement for preventing back pain, tension and circulatory problems in everyday office life.

Most office chairs fail not because of poor technology, but because of incorrect settings. A chair with a synchronous mechanism and lumbar support is of no use if the seat height is incorrectly adjusted or the backrest is completely locked. The following instructions will guide you through all relevant settings in the biomechanically correct order.

The perfect adjustment sequence: 6 steps to an ergonomic seat

Each step builds on the previous one - that's why the order is crucial. If you first adjust the armrests and then change the seat height, you have to adjust everything again.

Step 1: Adjust seat height

Stand in front of the chair and raise the seat Knee height. Then sit down and check:

The Knee angle is at least 90°, ideally slightly above (the thighs slope forward minimally)
The Feet are flat and completely on the floor
There is still freedom of movement between the seat and the back of the knees

Why this is important: A knee angle that is too low (below 90°) increases pressure on the intervertebral discs in the lower back because the pelvis tilts backwards. On the other hand, if the feet dangle in the air, the entire body weight rests on the back of the thighs - this restricts venous return and promotes swelling in the legs.

Step 2: Adjust seat depth/sliding seat

Slide your buttocks up to the backrest and check the distance between the edge of the seat and the back of your knees:

2-3 finger widths apart are ideal
With a sliding seat, the seat can be moved forward or backward accordingly

Why this is important: If the front edge of the seat presses into the back of the knee, the vein running there is clamped - this benefits you Blood congestion and long-term varicose veins. However, if the seat depth is too great, the lower back loses contact with the backrest and the lumbar support is completely ineffective.

Step 3: Adjust backrest & lumbar support

The lumbar support – the curve in the backrest – must be exactly at the height of the Lumbar spine Sitting, approximately at waist level:

Adjust the backrest height so that there is noticeable contact with the curve in the lower back area
If the curvature strength is adjustable: choose enough pressure so that the natural Lordosis (the slight inward curvature of the lumbar spine) is supported, not overpressed

Why this is important: If the support is too high or too low, the lumbar spine loses its natural shape and rounds - this puts pressure on the intervertebral discs between the lumbar vertebrae L4 and L5 increases noticeably. It is precisely this area that is most often affected by herniated discs.

Step 4: Adjust the counter pressure of the synchronous mechanism

The counter pressure (also called lean pressure) determines how much resistance the backrest offers when leaning back:

Choose resistance so that the backrest supports the upper body gentle but noticeable intercepts
Too little resistance: The backrest “falls away” when leaning back
Too much resistance: The backrest constantly pushes forward when sitting normally

Why this is important: Only if the counter pressure is set correctly can the synchronous mechanism do its job – follow the movement of the upper body instead of blocking it. A permanently locked or incorrectly adjusted backrest forces the back muscles to constantly work against the chair instead of being relieved.

Step 5: Adjust armrest height & depth

Sit upright, let your shoulders hang loosely and adjust the armrests so that:

The Forearms horizontal rest on the armrests
In Elbow at an angle of about 90° arises
The shoulders completely relaxed stay, not be lifted

Why this is important: If the armrests are set too low, the shoulders will sink and the upper body will lean to the side. If they are too high, the shoulders involuntarily pull up - both of which overload you Trapezius muscle and is one of the most common causes of neck and shoulder tension in everyday office life.

Step 6: Align head/neck support

If the chair has a head or neck rest, this is adjusted last:

Choose the height so that you can reach it Back of the head or upper neck area supports, not the middle back
Most effective in slightly reclined seats, for example during phone calls or reading breaks

Why this is important: A correctly positioned neck support relieves the strain on the cervical spine during rest phases and prevents the head from tipping back uncontrollably when leaning back.

Typical setting errors & how to avoid them

The following overview shows the most common incorrect settings and their immediate physical consequences:

Misalignment	Physical symptom/consequence	Here's how to do it right
Sitting position too high	Numbness and tingling in the legs due to pressure on the back of the thigh	Choose the seat height so that your feet are completely and flat on the floor
Permanently locked backrest	Muscle tension in the lower back, increased intervertebral disc pressure	Release the synchronous mechanism and adjust the counter pressure to suit your body weight
Armrests too low	Raising the shoulders, neck and shoulder pain	Adjust the armrests at the height of the relaxed forearms at a 90° elbow angle
Incorrect lumbar height	Hunched back, increased pressure on the L4/L5 intervertebral discs	Position the arch exactly at the level of the belt line/lumbar spine
Seat depth too deep	Lack of back contact with the backrest, lumbar support ineffective	Use the sliding seat until there is a distance of 2-3 finger widths from the back of the knee

The interaction of office chair and desk

The table height is always adjusted after the office chair – not the other way around. The reason: The seat height depends on the knee angle and the feet on the floor, i.e. according to fixed anatomical dimensions. The table height, on the other hand, can be adjusted to this already correct sitting position, so that the forearms can rest on the table top at a 90° angle without pulling up the shoulders.

What to do if the table is not height adjustable? In this case, the seat height remains the fixed reference value - the chair is still adjusted correctly, even if the feet no longer fully reach the floor. The solution is one ergonomic footrest: It compensates for the difference without having to reduce the seat height to the detriment of the arms and shoulders.

Dynamic sitting & the 60-30-10 ergonomic formula

Even the perfectly adjusted sitting position becomes a problem if you sit for hours rigid is maintained. Intervertebral discs are only supplied with nutrients through movement - if you remain immobile in the same position for hours, you interrupt exactly this supply mechanism.

That's why the right setting also includes the right use:

More conscious Switch between front, middle and back sitting positions distributed throughout the day
Use the synchronous mechanism as it is intended – resonating, not locked
Regular, short changes in posture instead of fixing a “perfect” position for hours

The 60-30-10 formula summarizes the ideal ratio for a healthy everyday office life:

60% dynamic sitting – at the desk, with changing positions
30% standing – for example at a height-adjustable stand-sit table during telephone calls or while reading
10% targeted exercise – short corridors, stretching breaks, stairs instead of elevators

Conclusion & quick checklist: Your way to pain-free work

The correct setting always follows the same logic: from bottom to top, step by step, without missing a single point.

Quick checklist to use:

✔ Seat height: Feet flat on the floor, knee angle at least 90°
✔ Seat depth: 2-3 finger widths distance between the edge of the seat and the back of the knee
✔ Lumbar support: Curve positioned at the level of the belt line
✔ Back pressure: The backrest provides gentle support without folding back or pushing forward
✔ Armrests: Forearms horizontal, shoulders relaxed, elbow angle 90°
✔ Table height: only after adjusting the chair, alternatively use footrest
✔ Movement: 60% dynamic sitting, 30% standing, 10% targeted movement

However, a chair can only offer these adjustment options if the seat height, seat depth, lumbar support, counter pressure and armrests are actually independently adjustable. In the range of buerostuhl24.com You will find fully adjustable ergonomic office chairs that enable precisely this individual adjustment to body size and sitting habits - the basis for a truly pain-free workplace.

Adjust the office chair correctly