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About Ergonomics » Ergonomic Checklist » Arms, Wrists, & Hands
- Adjust the keyboard height to allow an "open angle" (100° to 110°) with your arms. When positioned properly, the keyboard should be placed above laptop level to allow your arms to tilt downward while leaving your elbows at a comfortable open angle (100° to 110°). A slightly negative keyboard tilt will encourage a neutral wrist position. To avoid a positive tilt, make sure the legs on the back of the keyboard are in a lowered position. The use of a Keyboard Arm & Platform may provide the height, angle and distance adjustments needed.
- Key with your forearms parallel to the floor or angled slightly downward while keeping the wrists straight. Forearm Supports can also be used to provide postural support and freedom of movement while performing repetitive motion tasks.
- Avoid overreaching by keeping the mouse and keyboard within close reach. Center the most frequently used section of the keyboard directly in front of you. A Mouse Bridge offers a low cost solution to positioning the mouse directly over the 10-key portion of the keyboard, thereby minimizing arm extension while mousing.
- Use a good typing technique by floating your arms above the keyboard and keep your wrist straight when keying.
- If using a palm support or wrist rest, avoid planting and pivoting your wrists while keying. Wrist rests or palm supports are intended for resting between keying.
- Use a light force when striking the keys.
- Position the mouse at the same height as the keyboard and as close to the keyboard as possible. Hold the mouse with a relaxed grip and use a light touch when you click. Avoid moving the pointer with your thumb or wrist. Movement should originate at your shoulder and elbow.
- Avoid resting your wrist or forearm on the table while moving the mouse. Use your whole arm and shoulder to move the mouse, rather than pivoting at the wrist.
- Limit repetitive motions; reduce keystrokes with macros and software programs. Reduce pointing device movement with scroll locks and keystroke combinations.
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