Using your computer can be a pain in the neck?literally. If you r
monitor is not positioned correctly you may be tilting your head to
view, causing headaches and neck pain. A keyboard that's not
positioned correctly can lead to discomfort in your wrists, while an
improperly adjusted chair may cause lower back or leg pain.

Wrists

Typing can be stressful on the wrists. Stress on your wrists can be
reduced if you keep your wrists relatively straight while typing. It
is natural to have your wrists bent slightly upward and outward
while typing. Consider using a wrist rest in front of your keyboard
in order to help keep your wrists straight. The wrist rest should be
soft and arranged so that your wrists "float" just above it while
typing. Your wrists should not "rest" on the wrist rest during
typing - only when you are resting. Likewise, providing support for
your arms, such as adjustable arm rests on your chair, can also
help keep your wrists straight.

Keyboard and mouse location

The keyboard and mouse should be located lower than your elbow.
If they are higher or are located too far away, it causes your
shoulders to hold up the weight of your arms while you are
working. This becomes very tiresome and results in shoulder, neck
and backache. If possible, lower your keyboard and mouse, and
bring them closer to your body - a keyboard extension shelf can
help. If a keyboard extension shelf is not available, raise your chair
- but make sure that your feet remain firmly on the floor. If you
have adjustable arms on your chair, they should be adjusted to
provide arm support while you are typing.

Chair

Sitting is very stressful on your lower back. This can be minimized
if you maintain the normal curvature in the "hollow" of your back
while you work. You should concentrate on maintaining this
posture while working - it quickly becomes common practice. If
your chair has adjustable lower back support, adjust it so that it
provides firm support. A cushion or rolled up towel can also
provide lower back support.

The chair height should be adjusted so that your feet are firmly on
the ground and so that the angle at your knee is 90 degrees or
greater (the seat should be higher than the bottom of your
kneecap). A footrest is helpful if your chair needs to be higher in
order for you to use your keyboard and screen

Musculoskeletal Problems