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Your seat depth should allow your lower back to com-
fortably contact the backrest. Make sure that the backs
of your lower legs do not press against the front of
the chair.
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Extend your lower legs slightly so that the angle between
your thighs and lower legs is 90° or more.
T
Place your feet flat on the floor. Only use a footrest
when attempts to adjust your chair and workstation fail
to keep your feet flat.
T
Be sure that you have adequate clearance between the
top of your thighs and the underside of your workstation.
T
Use armrests or forearm supports to support your forearms.
If adjustable, the armrests or forearm supports should
initially be lowered while all the other adjustments dis-
cussed in this appendix are made. Once all these adjust-
ments are completed, raise the armrests or adjust the
forearm supports until they touch the forearms and allow
the shoulder muscles to relax.
Setting Up a Healthy Work Environment A-5
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