Setting Up a Healthy Work Environment A-5
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.
Extend your lower legs slightly so that the angle between
your thighs and lower legs is 90° or more.
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.
Be sure that you have adequate clearance between the
top of your thighs and the underside of your workstation.
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.
