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You are here: Home / Ergonomics / Proper Sitting Posture at a Computer (According to Experts)

Proper Sitting Posture at a Computer (According to Experts)

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Updated: April 27th, 2019

Most of us spend 8 – 9 hours a day sitting in front of the computer or work, plus a few more when we get home. We are unaware of just how poor posture is negatively affecting our health.

According to Better Health Australia, the negative impact of poor sitting posture at your desk include:

  • Rounded shoulders
  • Potbelly
  • Headaches
  • Muscle fatigue
  • Back, neck, and bodily pains

Overtime these ailments can develop into something much more serious, such as a permanent change in your spinal cord, and increased chances of cardiovascular Issues [1]. Yes poor sitting posture doesn’t just lead to temporary strain or discomfort, but long lasting negative effects.

Sitting isn’t complicated, but the correct sitting posture requires the proper guidance first, followed up by conscious effort to maintain it.

Contents

  • The Proper Sitting Posture According to Experts
  • Good Sitting Posture at a Computer
  • Good Sitting Posture for People with Back Pain
  • Other Postural Tips
  • Start Sitting Better Today at the Computer

The Proper Sitting Posture According to Experts

Proper Sitting Posture according to ExpertsWe’ve researched many sources, from UCLA Ergonomics to UBC Ergonomics and MedicalNewsToday [2][3][4]. There is a consensus on the best sitting posture when in front of a computer, and that is:

  • Sit with a back straight (no hunching), your shoulders pulled back and buttock touching the end of the seat.
  • Keep your neck and head in an upright angle with your ears aligned with your shoulders. According to studies, tilting the head forward just 15 degrees (so called “text neck”) doubles the amount of pressure on your neck as the weight of your head doubles.
  • Avoid leaning on any side. Keep hips even to distribute weight of body.
  • Bend your knees at a 90 degree angle, and keep your knees even with or slightly lower than hips.
  • Leave a 2-3 inch small gap between the bottom of your thighs and the edge of the seat. This helps reduce pressure build up in the underside of your thighs.
  • Keep both feet flat on the floor, or rest them on a footrest if you can’t reach it.
  • Don’t sit with your legs crossed, which restricts blood flow.
  • Avoid sitting for longer than 30 minutes at a time.

The above posture applies to sitting in general, whether it’s an office chair, wooden chair or kitchen stool.

Good Sitting Posture at a Computer

If you are sitting in front of a computer, there are other things to take into consideration, such as the optimal distance between your eyes and the monitor, your arms positions, and more. According to the same sources, observe the following:

Proper Sitting Posture at the ComputerNeck and Monitor Positions:

  • Position your monitor so the first line of text on the screen is eye level.
  • Neck should be neutral, with monitor directly ahead to prevent having to turn your neck.
  • Monitor should be placed at arms length distance, or 20 to 30 inches away.
  • When talking on the phone, use a headset or speaker phone functionality. Never hold the phone between your ears and shoulders, which can lead to muscle strains.

Body and Chair Positions:

  • Maximize contact of your back against the backrest of the chair. Use a separate lumbar pillow if needed.
  • Adjust the back of your office chair so it’s at a 100-110 degrees recline. A reclined angle reduces spinal pressure.
  • Shoulders should be relaxed.
Credits: Cornwell Ergonomics

Keyboard and Arms Positions

  • Adjust height of armrests so your elbows are at a 100-110 degrees open angle.
  • Place keyboard at a slight negative tilt if you are sitting upright.
  • When typing, hands should be slightly lower than elbows, with fingers pointing downwards/ at the floor.
  • Minimize any twisting of your wrists from side to side or up and down.
  • Keyboard trays can be helpful in obtaining the precise desired keyboard and mouse angles. Pick one that is large enough to accommodate both.
  • Use a keyboard palm rest as needed only when you are not typing. Do not rest your wrists on the rest when typing, which causes your wrist to turn side to side while keying, leading to wrist strain.
  • Make use of keyboard shortcuts whenever possible to optimize workload and minimize use of mouse.

Good Sitting Posture for People with Back Pain

If you suffer from back or neck pain, the ideal posture to relieve back tension and pain isn’t the upright 90 degree position. On the contrary, a reclining position is much better to reduce back tension that only exasperates back pain:

Pressure on the disc and back based on sitting posture and angle. 135 is Ideal.

According to a ground breaking study that used MRI scans to measure the amount of disc pressure different sitting postures produced, the sitting angle that resulted in the least amount of pressure is 135 degrees backwards.

See “Best Office Chairs for Back Pain” for our list of recommended chairs if you suffer from back or neck pain.

Other Postural Tips

Postural and Ergonomic Stretches

No matter how good your sitting posture is, there is no denying that sitting for long periods of time is fundamentally hazardous to your health. In fact, the negative impact from prolonged sitting cannot even be offset by exercising [5].

Here are some other important tips to incorporate into your everyday sitting if you want to live better and longer:

  • Get up and take a break from sitting every 30 minutes.
  • Incorporate standing periodically into your workflow, such as standing for a few minutes after every 30 minutes of standing. [6]
  • Move periodically, such as walking or doing simple ergonomic exercises for a couple of minutes after every 30 minutes. [6]
  • Ensure your room is well lit without causing glare on your screen. Dim lighting fatigues your eyes more quickly. [7]
  • Take eye breaks frequently, by looking at distant objects from time to time. Use a tool like the 20-20-20 app to give your eyes a rest for 20 seconds every 20 minutes.

Start Sitting Better Today at the Computer

In today’s era, many of us are literally glued to the computer at all times. As such, it is more important than ever to observe proper sitting posture. Follow the above guidelines from the experts, and slowly train your body to assume the ideal sitting posture whenever you sit.

Related Articles:

  • 10 Best Online Ergonomics Training Courses to Improve your Health at Work

Jon Muller

I'm a mechanical engineer and founder of ErgonomicTrends.com. Good Form. Good Function. Good Health.

Disclaimer: As an Amazon Associate I earn from qualifying purchases on this page.

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Reader Interactions

Comments

  1. Marina says

    February 16, 2019 at 7:47 am

    Thank you, Jon, for the information. I don’t suffer from any serious issues, but sitting on the desk all day long does lead to general aches and pains. After reading your article, I plan to give my posture more importance and make sure that I sit correctly. I never thought that the positioning of the keyboard was so important. It’s great that you pointed it out and gave some easy to follow recommendations.

    Reply
  2. Eric says

    February 7, 2019 at 12:06 pm

    Hey Jon, thank you for all the information. I suffer from a lingering back pain that isn’t all that bad, but my doctor suggested getting a proper desk chair and also correcting my posture. Although he explained it all to me, but sometimes it is difficult to remember after a while. Your post is helpful because now I have a ready reference whenever I need to focus on my posture. They really should print this out on a brochure and hand it out at clinics.

    Reply
  3. Lucy says

    January 19, 2019 at 5:32 am

    When I’m sitting in the office I make sure to stretch a little every half hour. The good thing in my office is that everyone is encouraged to get up and move about after every hour of work.

    Still, I agree having the right posture is equally important. One of my friends ended with severe back issues because she would always be leaning forward when looking at the monitor. Her posture was really terrible.

    Reply
  4. Mary Lin says

    November 22, 2018 at 8:20 am

    I appreciate that these guidelines are all from experts, but when it comes to sitting, the best posture is to get up and move! I try to do that at least twice an hour at work, more if you include bathroom breaks.

    Reply
    • Jon Muller says

      November 25, 2018 at 2:22 am

      Very true Mary! Good sitting posture is definitely no substitute for taking frequent breaks, stretching, and moving throughout the day. It can help however with issues such as back and neck pain, poor posture such as forward neck syndrome, and poor circulation. Just sitting up straight as you work has been proven to have a host of health and productivity benefits.

      Reply

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