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Here are
some tips to increase safety and reduce injury in
the workplace.
Guidelines to setting up your workstation
Office workers must use equipment that
is properly selected, coordinated and adjusted to
help prevent a range of injuries caused by overuse,
poor posture and poor lighting. |
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| 1. Chairs and posture
checklist for keyboard workers |
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Well-adjusted chairs improve
body position, blood circulation and reduce muscular
effort and pressure on the worker’s back. |
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Adjust the seat so that
you are comfortable in a slightly reclined position
and at a correct work surface height. If your feet do
not reach the floor, then a footrest should be used.
Adjust the backrest so that it supports the lower back
when you are sitting upright. |
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| 2. Work surface height |
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Adjust the height of the
work surface and/or the chair so that the work surface
is approximately a finger length below the height of
the elbow when seated. |
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| 3. Keyboard placement |
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Place the keyboard in a
position that allows the forearms to be close to horizontal,
upper arms vertical and the wrists straight, that is,
with the hand in line with the forearm. If this causes
the elbows to be held far out from the side of the body
re-check item 1. |
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| 4. Screen placement |
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Set the eye to screen distance
at the distance that permits you to most easily focus
on the screen. Usually this will be within an arm’s
length. Set the height of the monitor so that the top
of the screen is below eye level and the bottom of the
screen can be read without a marked tilting of the head.
Usually this means that the centre of the screen will
need to be near shoulder height. |
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| 5. Desk-top layout |
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Place all controls and task
materials within comfortable reach of both hands so
that there is no unnecessary twisting or reaching of
any part of the body. |
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| 6. Document holder |
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Place any document holder
as close to your monitor as possible in the position
that causes least twisting or tilting of the head. |
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| 7. Posture and movement |
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Change posture at frequent
intervals to minimise fatigue. Avoid awkward postures
at the extremes of the joint range, especially the wrists.
Take frequent short rests rather than infrequent longer
rests. |
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| 8. Glare and reflection |
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It is important to detect
the presence of glare and reflection. To determine whether
there is glare from overhead lights the seated worker
should hold an object such as a book above the eyes
at eyebrow level and establish whether the screen image
becomes clearer in the absence of overhead glare. To
detect whether there are reflections from the desk surface
the worker should hold the book above the surface and
assess the change in reflected glare from the screen. |
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A number of ways are available
to eliminate or reduce the influence of these reflections: |
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Tilt or raise the screen
so that reflections are directed below eye level. |
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Cover screens with an anti-glare
screen. |
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Negative contrast screens
(dark characters on light background) will reduce the
influence of these reflections. |
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Turn the screen brightness
down to a comfortable level. |
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Look away into the distance
every ten minutes or so in order to rest the eyes. |
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Change the text and background
colours. Recommended are black characters on white or
yellow background, or yellow on black, white on black,
white on blue and green on white. Avoid red and green
and yellow on white. |
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| 9. Using a mouse |
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A well-designed mouse should
not cause undue pressure on the wrist and forearm muscles.
A large bulky mouse may keep the wrist undesirably bent
at an uncomfortable angle. Pressure can be reduced by
releasing the mouse at frequent intervals and selecting
a slim-line, low profile mouse. |
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| 10. Keyboard and telephone
operations |
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Use an adjustable headset
with a volume control if continuous keyboard/telephone
operation is required. |
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| 11. Rest breaks and keyboard
work |
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The key in helping prevent
overuse injuries is to break repetitive work with non-repetitive
tasks and/or exercises and/or rest breaks. |
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Frequent short breaks are
most effective in relieving strain associated with keyboard
or mouse work. For sustained keying and mousing activity
a break should be taken for a few minutes every half
hour. During this break, operators should walk around
and move in a way that relieves the feeling of muscle
fatigue. Movements that are a natural response to fatigued
muscles such as shrugging and retracting the shoulders
are generally the most effective in dealing with muscle
fatigue. |
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