• The chair height should be adjusted so that: (A) the forearms
are parallel or slightly sloping down, to the keyboard; (B) the
shoulders are relaxed and; (C) the knees are slightly lower than
the hips.
• At the correct height your feet should be in contact with
the floor (D) If not then a footrest should be used. (E)
• Preferably the seat should tilt forwards to rotate the
top of the pelvis so that the spine is in its natural ‘S’
shape. Try a chair with a rocking action to help vary and change
postures.
• The small of the back (Lumbar) should be supported (F)
to help preserve the natural curve of the spine. This may be affected
by the depth of your seat, which should allow you to sit right back
into the chair without putting pressure on the back of your calves.
(G)
• Sit back in an upright posture, slightly relaxed into the
backrest with the head over the shoulders and in line with the buttocks.
Try not to sit bolt upright or perch on the edge of your chair as
this will encourage you to slouch.
• Your screen should be placed directly in front of
you to prevent you from twisting to see the screen. Your screen should
be approximately arms length away (H) from you and you should have
a natural and relaxed eye level at the top of the screen (I). Touch
typists may prefer to have the screen raised higher than a copy typist
as they do not have to ‘drop’ the head to see the keyboard.
• Laptop users will benefit from a laptop stand (J) to raise
the height of the screen to the appropriate height. A separate keyboard
and mouse would be needed with this configuration.
• Place all things that you must operate with your hands,
such as the keyboard and mouse, directly in front of you (K) and
with the elbows at 90° by your side. This will reduce the need
to overreach, causing the body to move away from the back support
and encouraging you to slouch.
• If you have to look at documents when you type, consider
using a document holder (L) so that you don’t have to look
down to the documents and then up to the screen which can cause
neck strain. This is best placed directly in front of the monitor
to avoid twisting the neck. Consider an Inline Copyholder or Flexdesk.
• If you regularly need to write or read documents away from
the computer, consider using a writing/reading slope (M) to allow
you to sit back in your chair and prevent leaning forwards over
the desk.
• If you regularly use a telephone whilst typing, try using
a headset to allow you to type freely with both hands.
• Make sure the space under your desk is free from clutter
and that your legs are free to move from side to side.
• You should avoid static postures by changing tasks and
taking regular breaks away from the workstation.