Toshiba Equium 8000 S-D - Manual (Page 24)

User's Manual Getting Started 1-3
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Seating and posture
When using the computer, maintain good posture with your body
relaxed and your weight distributed evenly. Proper seating is a primary
factor in reducing work strain. Some people find a backless chair more
comfortable than a conventional chair. Whichever type you choose, use
the following guidelines to adjust your chair for maximum computing
comfort.
Correct posture and positioning of the computer
Y Position your chair so that the keyboard is at or slightly below the
level of your elbow. You should be able to type comfortably with
your shoulders relaxed and your forearms parallel to the floor.
If you are using a conventional chair:
Y Your knees should be slightly higher than your hips. If necessary, use
a footrest to raise the level of your knees and ease the pressure on
the back of your thighs.
Y Adjust the back of your chair so that it supports the lower curve of
your spine. If necessary, use a cushion to provide extra back support.
Lower-back-support cushions are available at many office supply
stores.
Y Sit with your back straight so that your knees, hips, and elbows form
approximately 90-degree angles when you work. Do not slump
forward or lean back too far.