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T 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 discussed in this appendix are
made. Once all these adjustments are completed, raise the armrests or
adjust the forearm supports until they touch the forearms and allow the
shoulder muscles to relax.
Adjust Your Input Devices
Follow these points in positioning your keyboard and mouse.
T Position your keyboard directly in front of you. Avoid reaching when
using your keyboard or mouse.
T If you use a mouse, position it at the same height as the keyboard and
next to the keyboard. Keep your wrists straight and use your entire
arm when moving a mouse. Do not grasp the mouse tightly. Grasp the
mouse lightly and loosely.
Setting Up a Healthy Work Environment A-5
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