HEIGHT: Your keyboard, mouse, and working surface should have the proper height and angle to prevent users from bending their wrists and lifting their arms too often. The user’s elbows should hang freely and keep close to the sides of the body. Forearms should stay parallel to the floor. There are three ways to make this easier. Install an adjustable keyboard tray, adjust the working surface to fit the user, or raise the user’s chair and provide a footrest if needed.
PLACEMENT: A user should not be forced to keep reaching for their keyboard and mouse. Those items to should be close, so that the user can keep a straight line between their hands their forearm. Mouse platforms that rotate above the users keyboard are a simple solution for this problem.
HAND POSITIONING: Wrists should not bend sideways, up, or down. They should remain straight. When not using the keyboard or mouse your hands should be at rest in your lap. Wrist rests should not be used while typing, since this will cause your wrists to bend. Keys should be pressed gently and not held down for extended periods of time. Track balls and touch pads are great ergonomic alternatives to a traditional mouse. There are also split keyboards that allow you to hold your hands in a more natural position when typing.
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