Keyboards, pointing devices (mouse), or working surfaces that are too high or too low can lead to awkward wrist, arm, and shoulder postures. For example, when keyboards are too low you may type with your wrists bent up, and when keyboards are too high, you may need to raise your shoulders to elevate your arms. Performing keying tasks in awkward postures such as these can result in hand, wrist, and shoulder discomfort.
Possible solutions for keyboard height issues
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Adjust the chair height and work surface height to maintain a neutral body posture. Elbows should be about the same height as the keyboard and hang comfortably to the side of the body. Shoulders should be relaxed, and wrists should not bend up or down or to either side during keyboard use.
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Remove central pencil drawers from traditional desks if you can't raise your chair high enough because of contact between the drawer and the top of the thighs.
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A keyboard tray may be needed if the work surface or chair cannot be properly adjusted. The keyboard tray should reduce awkward wrist angles by lowering or raising the keyboard or chair to achieve a neutral wrist posture.
- Be adjustable in height and tilt,
- Provide adequate leg and foot clearance, and
- Have adequate space for the keyboard and pointer/mouse.