The muscles in your upper back stay
tense if you sit in a rigid upright posture. Also, if you work
in a twisted position the muscles are unevenly balanced and
they become painful.
Arrange your work so that you are looking straight ahead
most of the time.
Make sure your keyboard
is parallel to the front of your desk when you are using
it.
Sit back in your chair and rest your upper body against
the backrest.
Change your sitting position at regular intervals by leaning
slightly forward and then slightly backward.
Pause from your work to stretch and move away from your
desk. Take a break!
