Many ergonomic problems associated with computer use occur in the shoulder, elbow, forearm, wrist, and hand. Continual work on the computer may expose soft tissues in these areas to repetition, awkward postures, and forceful exertions, especially if the workstation is not set up properly.
Adopting the correct posture, coupled with regular breaks will help prevent many of the stresses brought on by repetitive keyboard use.
Adjust keyboard height so shoulders can relax.
Position the keyboard directly in front and be close to the user to avoid excessive extended reaching.
Keep forearms parallel to the floor (approximately 90 degree angle at elbow).
Padded wrist rests will help to keep your wrist in a straight and neutral position while typing and keep your arms off the sharp edges of the work surface.
Do not rest your wrists or hands on a palm or wrist rest when you are keying.