| The ideal location: |
| For traditional desks this probably means raising your chair. They were not designed for keyboards. | |
| The keyboard should be just above the level of your lap. This is possibly lower than you might expect. | |
| It leaves your elbows at a comfortable angle and minimises the pressure on wrists and fingers. Your forearms should be roughly parallel to the floor. |
| The aim is to keep your wrists in a neutral, (not bent up or down) relaxed position. | |
| Use the legs under most keyboards to tilt the back edge of the keyboard up or down. Use a thick ruler under the front edge to achieve negative keyboard tilt. | |
| The angle you adopt depends on the ergonomic curvature of the keys and the keyboard's distance from you. |
| It is a tiring and ultimately stressful to raise your elbows with your shoulder muscles. | |
| To check your posture let your arms hang naturally then lift them to the keys to check the height is correct. | |
| You should not have to adjust to the height of the keyboard by hunching your shoulders. |
| Align yourself with the "B" key. | |
| Keyboards are not symmetrical. Most have a numeric keypad on the right. Unless you are doing your accounts, centre yourself in front of the letters. |
| If you have a laptop, you are stuck with a flat, badly set out keyboard. The lap would probably be a better position to work on it from than a desktop. | |
| If you are not a touch typist, the location of the keyboard might be influenced by the need to have the keys at the same distance from your eyes as the screen. | |
| Body shape matters. If you have a broad chest, or have to work from a chair with armrests, consider a "split" keyboard where the two halves incline slightly outwards. This allows your arms to point inward conforming to the contours of your body. |
Wrist rests |
Wrist rest is both a tongue-twister and a misnomer. |
| It is probably your palms rather than the wrists that you will rest on any surface. | |
| Neither part of your anatomy should be in contact with the surface while typing. | |
| When you are using the mouse, a wrist wrest can help to keep your hand level with your arm. The temptation is to flex the wrist. Some people use the arm- rest of their chair to keep the hand and arm in a straight line. You should avoid this. | |
| Modern keyboard designs have a detachable skirt above, which your hands can float and rest on whenever you pause for thought. | |
| Aligning the keyboard with the edge of the desk ensures that the wrists 'float'. | |
| Repeated bending of your wrists up and down compresses the structures inside the carpal tunnel. | |
| It is good practice to rest your hands in your lap when you are not typing. |
Pointing devices
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The standard 2 mouse button can be hard on
the hand, arm and wrist if used for prolonged periods.
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| Some keyboard "Dos & Don'ts" |
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Tips
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Technology to save finger work |
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© charles jones 2002 |
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