Achieving a Healthy Sitting Position at the Office: Your Guide to Ergonomic Comfort
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About the author:
Ronel Hendry
“Create Healthy Workspaces”
A healthy sitting position at your desk means your feet are flat on the floor, your knees are slightly lower than your hips, your lower back is supported, your elbows are bent at about 90 degrees, your shoulders remain relaxed, and your forearms are supported on the armrests or the surface of the desk. Your spine should stay in a neutral position while your chair supports natural movement throughout the day.
Contrary to popular belief, there is no single “perfect” sitting posture. The real problem is sitting in a static position for too long. Even good posture becomes unhealthy when you remain motionless for hours.
If your neck, shoulders or lower back ache after a day at your desk, your sitting position or workstation setup may be contributing to the problem.
Research from organisations such as Harvard Medical School has linked prolonged sitting and poor posture to:
- neck and shoulder strain
- lower back pain
- poor circulation
- fatigue
- headaches
- incontinence
- constipation
- heartburn
- and reduced concentration.
Healthy Sitting Position Checklist
Use this quick checklist to improve your posture while working at a computer:
- Shoulders relaxed, not elevated
- Elbows bent at roughly 90°
- Forearms parallel to the floor and supported by the armrests or desk surface
- Feet flat on the floor or on a footrest
- Knees slightly lower than hips
- 2-3 finger gap between front edge of the seat and the back of your knees
- Back fully supported by the backrest
- Lumbar support fitted into the curve of your lower back
Why your sitting position matters
After assessing thousands of office workstations, one of the most common problems we see is people using ergonomic chairs incorrectly, or worse still, not adjusting them at all. Many people sit:
- too low or too high
- too far forward
- without lumbar support
- or with armrests positioned incorrectly.
These small setup errors place continuous stress on your muscles, joints and spinal discs. Over time, this impacts your overall wellbeing through discomfort, fatigue and reduced productivity. A properly adjusted ergonomic chair helps distribute pressure more evenly across your body and reduces unnecessary muscular tension.
Even the most expensive ergonomic chair will not help if it is adjusted incorrectly.
The ergonomic features on your office chair are there for a reason.... use them!
A video guide on how to correctly adjust your office chair, desk and monitor.
A healthy sitting position – what is the right way to sit?
1. Adjusting the seat height
Your chair is at the correct height when both your feet are flat on the floor (or on a footrest), and your knees are slightly lower than your hips.
Sitting at this height prevents undue pressure on lumbar discs and avoids muscular tension in your shoulders and neck. What is the correct ergonomic height for my desk, computer monitor and office chair?
Seat height adjustment
Left: Seat height is too low and angle of the elbows is less than 900. Forearms are not parallel to the floor.
Right: Seat is too high and angle of the elbows is greater than 900. Again, forearms are not parallel to the floor. The hunched back typically results in muscular pain in the upper back and shoulders.
2. Adjust the depth of the seat (seat slider)
Office chairs equipped with a seat slider empower you to fine-tune the seat depth, enabling you to move the seat pan backward or forward to align with the length of your thighs. When you are seated comfortably with your back against the backrest of the chair, there should be a 2-3 finger gap between the front edge of the seat and the back of your knees. This practice not only prevents strain behind the knees but also provides optimal upper leg and under thigh support, promoting good blood circulation.
Note: Not all office chairs have a seat slider.
- For taller individuals with long legs, a seat slider allows them to INCREASE the seat depth, thereby maintaining a good sitting position. Conversely, shorter people should consider REDUCING the seat depth.
- If the seat is excessively long (deep), anyone with shorter legs might find themselves sitting on the front edge of the seat, leading to a lack of adequate back support.
The seat should also have a slight downwards curve in the front (waterfall front), to reduce the pressure on the back of your thighs. The importance of a good sitting posture.
A good sitting position is when your back is properly supported by the backrest and there is a 2-3 finger gap between the front edge of the seat and the back of your knees.
Click here to see which chairs have a seat slider that allows seat depth adjustment.
3. Armrest adjustment for a good sitting position
When seated on the chair, your forearms should be parallel to the floor and your elbows should be bent at about 900. Incorrect armrest positioning can lead to muscle tension in your neck, shoulders, arms, and wrists.
4. Backrest angle adjustment
A chair that allows you to recline the backrest angle between 900 and 1100 is ideal. Sit with your back fully against the backrest. What is the difference between office chair mechanisms?
The ideal sitting position is when the chair backrest is unlocked (free-floating), so that it moves with your body. This will ensure that it provides continuous support. Furthermore, tiredness will be reduced as your core muscles will be stimulated and blood flow improved.
Make sure that you adjust the spring tension in the backrest to match your body weight.
Some chairs automatically adjust the spring tension in the mechanism to suit your body weight. Click here to see which chairs have an automatic self-adjusting tension mechanism.
5. Good lumbar support is important for a healthy sitting position
An important feature for every office chair is a height adjustable backrest and/or adjustable lumbar support.
Position the lumbar support so that it fits snugly into your lower back and keeps your spine in a neutral position.
6. A headrest may improve your sitting position
Not all ergonomic chairs have a headrest and not every person needs one.
If your chair has a headrest, ensure it supports your neck and shoulders in their natural position. Improper headrest positioning can lead to tension headaches, upper back pain, and neck strain.
The headrest should be positioned so that it supports head in it’s natural position. In other words, the headrest must not push your head forward or allow it to fall backwards.
A headrest that is not suited to your height can cause more harm than good.
A headrest that is too low, may force you to hunch over and extend your neck forward. The forward angle of your head can result in tension headaches, upper back, shoulder, and neck pain.
For tall people, ensure that the headrest can be extended high enough to correctly support your neck and head. Best office chairs with a headrest for tall people.
An unhealthy sitting position – how NOT to sit
Taking breaks or doing a short workout increases energy, productivity and creativity, while also reducing stress and possible burnout.
Don’t:
If you don’t have an adjustable office chair, consider purchasing one. Why a fully adjustable office chair is important. A good ergonomic chair with adjustable features will allow you to create a healthy sitting position. This in turn will improve your wellbeing, comfort and productivity. However, this will only be the case if your chair is being used correctly!
Conclusion
Maintaining a good sitting position is crucial for your overall wellbeing, and having an ergonomic office chair is only beneficial if it's adjusted correctly. Follow our step-by-step guide and download our checklist to ensure that your chair is set up in the right way, promoting a positive impact on your daily work routine. Your comfort and productivity depend on it!
By the same author:
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