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•Keep your forearms horizontal with your wrists in a neutral, comfortable position
while using the keyboard, trackball, touch pad, or external mouse.
•Always use the palmrest with the keyboard, touch pad, or trackball. Leave space
to rest your hands when using an external mouse.
•Let your upper arms hang naturally at your sides.
•Sit erect with your feet resting on the floor and your thighs level.
•When sitting, make sure the weight of your legs is on your feet and not on the
front of your chair seat. Adjust your chair’s height or use a footrest, if necessary,
to maintain proper posture.
•Vary your work activities. Try to organize your work so that you do not have to
type for extended periods of time. When you stop typing, try to do things that
use both hands.
arms at desk level
computer positioned
directly in front
of user
wrists relaxed
and flat
3959ubk1.book Page viii Monday, March 20, 2000 4:52 PM