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Workstation Ergonomics

Workstation Related Issues

Do you suffer from pain or discomfort in your neck, shoulders, forearm or wrist?

Do you regularly sit at your workstation and or computer for hours at a time?

Are you aware of your posture at your desk or do you adopt any position that feels ok at the time?

Are you aware of how to set your workstation up so it minimises the strain on your body?

If you recognise any of these above factors, you may benefit from not only having physiotherapy treatment for your symptoms, but you may also benefit from an individual workplace assessment.

Here at Back in Business we can assist you with both areas. We can assess your injury, provide appropriate treatment AND we can arrange to visit you at your worksite to assess your workstation and work postures, then recommend solutions which may also assist in improving your physical symptoms.

Call us on 9922 6806 to make an appointment.

Did you know that if you sustain a small movement repetitively

or hold an object with more force than is necessary, the blood flow to the area can be hindered from clearing away the waste products and this can change the biochemistry of the area and result in a compromised viability of the affected tissues? This can often happen with continuous use of the mouse, for example.

The first signs of this happening can be a soreness or ache while at work. If the condition is not resolved, the length of time symptoms are experienced often increases.The earlier these symptoms are addressed the quicker they can be resolved. The team at Back in Business can assess your injury and advise you on the best forms of management.

How you sit in your work chair determines the positioning of your low back but also your head and neck. If you are sitting slouched and on your tailbone, like a series of dominoes, your head and neck cannot possibly be in a good position. Most commonly your head will also be poked forward creating shearing forces at the base of the skull and base of the neck. These postures can contribute to headaches, neck pain, shoulder pain and more. Adjusting your sitting position, so that you are sitting on your sitting bones (ischeal tuberosities) is the first step to taking strain off your head and neck areas. Ensuring you have a sound ergonomic setup of your workstation is important, especially if you are receiving treatment for an issue where posture is a contributing factor. The team at Back in Business can arrange to assess your workstation and advise you if any adjustments are required.

Long periods (3 hours) of sitting has been shown to result in a significant impairment in the shear rate on superficial femorial artery flow mediated dilation which has been associated with cardiovascular disease risk factors (Thosar et al 2015, Med Sc Ex Sp, 47, 4, 843-849). Taking regular breaks from sitting or using a standing desk may ameliorate blood flow issues. However, standing cannot be static and postural pertubation exercises should be employed.

Instead of using a mouse, have you thought about using X Box contoller?  http://www.instructables.com/id/Use-an-Xbox-360-controller-as-a-mouse/ All you need is Windows XP or above, a spare USB port, and an Xbox 360 wired controller. This costs $40 retail, but you should be able to find it for around $20 online. If you don't already have a wireless controller or you only have one (and want another controller for multiplayer games on your Xbox 360) then the wired controller is the better choice.

 XBox360controller1

Workstation Ergonomics

Workstation Adjustment

Chair

  • Is the chair easily adjusted from a seated position?
  • Can the user get close to the workstation without impediment? (ie desktop thin, chair arms aren't in the way and there is clear leg room)
  • Is the seat height adjusted with the users' thighs parallel  or slightly inclined downwards to the floor?
  • Is the backrest height adjusted to fit the small of the users' back and adequately support the spine?
  • Is the backrest angle adjusted for the user to sit upright whilst keying?

Desk

Keyboard equipment
 
AS 3590---1990 recommendations for Screened based workstations
 
Height of work-surface
if fixed 680-720 mm
if adjustable 580-730 mm
 
Area of work-surface
Width 1500 mm minimum
Depth 900 mm minimum
Bench thickness 25 mm maximum
 
Volume of leg-space
Width 800 mm minimum
Depth 550 mm minimum
Height 580 mm minimum
 
Viewing distance to work
Minimum 350 mm minimum
Maximum 750 mm minimum
Height of display 30-40 degrees below eye level
 
Seat pan height
Surface of seat to floor 380-510 mm
Seat pan depth 330-430 mm
Footrest area 300x375 mm
  • Are the users forearms parallel to the floor or angled slightly downward?
  • Is the desk height adjustable?  if YES is the desk easily adjustable? if NO has the user been provided with a footrest?
  • Is the footrest wide enough for both feet?

Screen

  • When sitting tall and looking straight ahead, is the user looking at the top edge of the screen?
  • Is the screen at a comfortable reading distance?
  • Are all the characters in the display easily legible and is the image stable?
  • Can the position and contrast of the screen be adjusted by the user?

Documents

  • Are all the source documents legible?
  • Is a document holder provided?
  • Does it support all source documents adequately?
  • Can documents be manipulated easily?

Workstation Ergonomics

Layout

  • Are all often-used items within easy reach? ie. normal arm reach with minimal trunk movement?
  • Is there sufficient space for large documents, completed work or writing?
  • Is there sufficient space for CAD furniture, equipment and hard copy materials?
  • Is the workstation designed to prevent undue twisting of the neck or trunk?

Keyboard

Workstation Ergonomics

  • Is the keyboard detached from the screen to ensure a comfortable working position?
  • Is the keyboard thin enough for comfortable positioning of the hands (eg. less than 300 mm thick for the home row of keys)?
  • Is there a gel wrist support?
  • Is the keyboard matt finished to prevent irritation from glare and reflection?
  • Can the keyboard tray position be manipulated ie higher/lower and/or tilt?
  • Get a Gaming Keyboard with Programmable Macros Hotkeys

    A lot of people copy and paste all day, and many use the Ctrl+C and Ctrl+V keyboard shortcuts. Now, I never learned to type so I use my two middle fingers and look at the keys. I’ve tried to learn to type the real way, but it hurts my tendons to use all those fingers rather than just powering through using my two longest fingers. This means I also use two hands to do my keyboard shortcuts. I tried doing the finger spread with my left hand but it irritated my tendons very quickly. If you cut and paste perhaps several hundred times per day, using two hands or even two fingers on one hand, it’s going to take its toll.

    Now what if I told you could have a keyboard that could do anything – be it a keyboard shortcut, inserting a line of text or even launching an application – with just one keystroke. Well if you get a gaming keyboard with programmable hotkeys you can do just that. The Logitech G110 is life changing. You can have instant access to 12 shortcuts of yout design and another 24 on reserve. But if you really want just copy and paste shortcuts then you can programme all the left hotkeys for copy and all the right hotkeys for paste. Now it’s nearly impossible to miss!

Mouse

  • Is there over reaching with the mouse?
  • Can the user manipulate the mouse ambidextrously?
  • Does the user know their 'short cut' keys?
  • Is a trackball more appropriate?
  • Is there a gel wrist support?
  • Set your mouse for one click
  • Better still get a gaming controller.

Get Rid of The Mouse and Buy A Pen Tablet

I don’t think anyone should be using a mouse. It was an ergonomic nightmare when it was invented and it still is today. Do this little test. Hold your arm out in the mouse position – forearm parallel to the floor, elbow cocked at a 45 degree angle, your palm facing down- and extend your index finger like you are using an invisible mouse. Hold it for 30 seconds and notice how awkward it is and how your arm doesn’t feel stable and strong. Now, without changing anything else, rotate you hand into a pencil holding position. If you are right-handed you’ll rotated your hand 45 degrees to the right. Feel the difference? Notice how your shoulder relaxes and how stable your arm feels now? That’s why you need to switch from a mouse to a pen tablet. Professional designers or serious hobbyists should spend the big bucks on the Wacom Intuos but regular folk will do just fine with the very affordable Wacom Bamboo.

wacom intuos ergonomic pen grip1

Environment

  • Does the user find the lighting satisfactory? eg glare, reflection and the ability to read documents.
  • Does the user find the noise level conducive to concentration? Or for the use of voice activated keyboard tasks?
  • Does the user find the temperature and airflow comfortable?

Telephone Operations and Headsets

  • Is there a headset available for continuous telephone operations?
  • Is the headset lightweight, adjustable and comfortable?
  • Does the telephone equipment include easily adjustable volume controls?
  • For telephone operations that are traffic dependent and continuous, is manual call control facility provided?

Work Organisation

  • Does the user have a variety of tasks? If YES does the user have some control over the order in which they are done?
  • Is care taken to avoid placing the user under to meet demanding work targets or deadlines?
  • Has there been constancy in workload recently? (Preferable to sudden increases in workload or working overtime)?
  • If the user is a new staff member, or has returned from leave, did they have a period to adjust to the workload?
  • Have pauses been taken as a appropriate?

Although every attempt has been made to cover the majority of issues related to work station complaints, this list may not be exhausted and its' accuracy may change as new research is completed.  Seek a workstation assessment by a designated professional.

Martin Krause,  22/05/01
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Print Version (word doc)
EMG biofeedback assessment may be necessary ?
common conditions related to poor posture
Last update : 3 September 2015

Workstation Ergonomics

Tennis elbow or lateral epicondylitis has been shown to have a maladaptive impact on motor cortical maps in the brain which can result in chronic muscle hyperactivity and chronic or recurrent elbow pain (Schabrun et al 2015, Med Sc Sp Ex, 47, 4, 681-690). Physiotherapy using a muti-modal approach as well as electrotherapy and biofeedback can be used to address these issues.


 

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Updated : 10 May 2014

No responsibility is assumed by Back in Business Physiotherapy for any injury and/or damage to persons or property as a matter of product liability, negligence, or from any use of any methods, products, instruction, or ideas contained in the material in this and it's related websites. Because of rapid advances in the medical sciences, the author recommends that there should be independent verification of diagnoses and exercise prescription. The information provided on Back in Business Physiotherapy is designed to support, not replace, the relationship that exists between a patient/site visitor and their treating health professional.

Copyright Martin Krause 1999 - material is presented as a free educational resource however all intellectual property rights should be acknowledged and respected