Correct Height Adjustment for Office Chairs

12th April 2016  •  No comments yet  •  Posted in Adapt IT news

What is the correct height adjustment for my chair?

Your seating position is relevant to your office workstation – an obvious but often overlooked fact. You should be able to sit and work in physical comfort with sufficient manoeuvrability. The three key areas that affect your posture are: the seat, the desk top or keyboard, and the floor. At least two of the relative factors need to be adjustable, usually the chair and the desk height.

Most commonly available is an adjustable chair. A good, fully adjustable chair will be able to accommodate all but ten per cent of people of various shapes and sizes. A choice of chairs is available so here are some tips on how to select the best fit for you.

  1. When seated in the chair, ensure that essential controls are comfortably accessible – you should not have to leave the chair to adjust it.
  2. Check the range of height adjustment and choose a chair that will also tilt and swivel.
  3. There should be a backrest for lumbar support for long term sitting.
  4. The seat front should curve towards the floor for ease of leaving the chair and comfort whilst seated. Ensure that the seat width and length is correct for you.
  5. Ensure that the seat is not covered in slippery fabric!

Also, avoid budget chairs that skimp on safety, e.g. there should be a stable base with five points of floor contact and the wheels or casters should be suitable for the surface the chair is to be used on, such as solid floor or carpeting.

Armrests are optional, depending on preference. If included, they should allow your arms to have freedom of movement and offer support at a comfortable height for your seated position. Bear in mind that shorter length armrests should enable you to work closer to the desk – if possible, test the chair in a simulated work environment.

How to adjust the height of your chair

Basic adjustments for correct posture and comfort begin with the chair height relative to the floor. Here are the main points of adjustment:

  1. Stand against the seat of the chair. Your lower kneecap should rest above the sitting surface of the seat.
  2. Sit up straight on the chair with your back against the chair-back and feet flat on the floor. There should be a gap between the front edge of the seat and your lower legs of 5cm/2” (you should be able to tuck in 3 or 4 fingers).
  3. The backrest should be adjusted to support the hollow of your lower back.

If you have armrests, they should be adjusted to just below your elbows when seated with arms by your sides and bent at 90 degrees at the elbow.

How your chair should relate to your desktop

When seated at your workstation, your forearms should rest on the desktop which should be set to the same height as your elbow, using the position described for armrest height adjustment. There should also be freedom of movement for your legs under the workstation and your chair should easily slide in and out with you on it.

If you are lower the height of your workstation, you may need to raise your chair seat height and compensate with an appropriate height foot-rest so that both feet may remain flat and firm. If the workstation is too low so that you are unable to sit with your legs under it and it has no means of adjustment, do not use it long-term but consider some alternative arrangement for future use.
adjustable workstation

Please visit our shop to see a selection of adjustable chairs, adjustable workstations and comfort accessories.

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