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Risk factors of work-related musculoskeletal
disorders may be present when you use input devices during computing tasks. If
the keyboard and mouse are positioned too near or too far from the body, you will
have to assume an awkward posture when using these devices. If you have a mouse
that is too big or too small for you, you are giving stress to your shoulders,
arms and hands. Unnatural movements of the fingers and hands are seen when doing
shortcut keying. Inappropriately-sized keyboards also cause poor wrist position.
Sometimes the work surface is too small leaving no space to support the wrist
or arm. This condition leads to fatigue of the upper limbs. |
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Place the keyboard and mouse within comfortable
reach. The mouse should be positioned next to the keyboard. Both inputs devices
must have the same height level. |
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Adjust the height of your keyboard until
your wrists are straight and until the forearms are parallel to the floor. |
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Provide adequate space that you can use
as armrest or wrist rest. For chairs with armrests, use this properly to remove
postural stress from your body. |
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Choose the type of input device that
is fit to your body size. For instance, replace a big mouse with a smaller one
to avoid discomfort. |
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Use an external mouse when using a laptop
computer. The use of internal mouse forces small awkward movements that may lead
to discomfort. If you intend to use the laptop computer for a long time, the use
of an external keyboard is also recommended. |
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| Appropriately
positioning the mouse and keyboard |
Using the external
keyboard and mouse
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