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#11
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Correct angle for keyboard
****wit.
John Doe wrote: Troll Rod Speed rod.speed.aaa gmail.com wrote Archie no com.com wrote: Is there a generally-accepted best angle for the slope of a regular keyboard? Nope. One web page says this: ------------------ BEGIN QUOTE ----------------- "angle of the keyboard relative to the angle of the wrist. Most keyboards slope upwards from front to back, and this means that users bend their hands upwards when they are typing on the keyboard. Nope, the hands just move over the keyboard with the arms doing that instead. This posture is called wrist extension, and we know that it is a source of injury risk for the wrist. No we dont. In spades when the arms are what moves. Once the hand is extended beyond about a 15° upward angle, Pity that doesnt happen. there is a very significant increase in the compression on the median nerve and other structures inside the wrist. Wrong again. So it is extremely important to type with the hands as flat as possible. Wrong again. From http://ergo.human.cornell.edu/AHTutorials/ckd.htm ------------------ END QUOTE -------------------- Which I interpret as being zero to 15 degrees. Nope, they are clearly saying that last that zero is best. They are wrong. But my Compaq keyboard permits either: (1) flat or maybe 5 degrees (2) about 30 to 35 degrees. I doubt you type enough to matter. |
#12
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Correct angle for keyboard
Trev trevbowdenHATdsl.pipex.com.invalid wrote:
How on earth did those typists manage with three hights of keys, The fingers do have quite a bit of flexibility. no wrist pads Those are relatively recent, and the original typewriters clearly didnt have the keyboard flat on the desktop. and having to put even force behind the key's. You dont have to do that with an electronic keyboard. |
#13
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Correct angle for keyboard
"Rod Speed" wrote in message ... ****wit. You give him way too much credit John Doe wrote: Abosolutly never, ever anything worth reading. |
#14
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Correct angle for keyboard
Don Freeman wrote
Rod Speed wrote ****wit. You give him way too much credit True. John Doe wrote: Abosolutly never, ever anything worth reading. True. |
#15
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Correct angle for keyboard
kony wrote
Archie wrote Is there a generally-accepted best angle for the slope of a regular keyboard? One web page says this: ------------------ BEGIN QUOTE ----------------- "angle of the keyboard relative to the angle of the wrist. Most keyboards slope upwards from front to back, and this means that users bend their hands upwards when they are typing on the keyboard. This posture is called wrist extension, and we know that it is a source of injury risk for the wrist. Once the hand is extended beyond about a 15° upward angle, there is a very significant increase in the compression on the median nerve and other structures inside the wrist. So it is extremely important to type with the hands as flat as possible. From http://ergo.human.cornell.edu/AHTutorials/ckd.htm ------------------ END QUOTE -------------------- Which I interpret as being zero to 15 degrees. But my Compaq keyboard permits either: (1) flat or maybe 5 degrees (2) about 30 to 35 degrees. 1) Keyboard tilt is mostly to help those who can't type and need to see the keys best. Bull****. Have fun explaining the keyboards on typewriters that were designed to be used by professional typists. The normal keyboard position is almost flat for someone who can type. Bull****. Have fun explaining the keyboards on typewriters that were designed to be used by professional typists. 2) The issue is not keyboard tilt at all (not to do it) but rather, keyboard height. Sitting straight in the chair with arms at near parallel to the floor, wrists should bend downward slightly, that is where the keyboard should be. If it isn't, the table/desk/whatever needs changed. It isnt that black and white, particularly if you are only typing spasmodically as is the case with most PCs. So you want #1 above, but it's not as important as the correct keyboard (table) height, OR the correct chair height to match the keyboard height BUT there are other issues for chair height like proper ergonomics for your upper legs so it is typical to adjust table height to the correct level for a properly fitting chair (to the user), not adjust chair height. I have never bothered with that crap, used to type with my feet up on the desk with detachable keyboards in my lap, and now I only ever use a full armchair with my feet up and the keyboard in my lap. |
#16
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Correct angle for keyboard
On Wed, 26 Jul 2006 11:05:49 +0100, "Trev"
trevbowdenHATdsl.pipex.com.invalid wrote: How on earth did those typists manage with three hights of keys, no wrist pads and having to put even force behind the key's. **DID** they manage ? Or was injury not recorded ? I can imagine, that in the early days, ppl were just dismissed when ill... |
#17
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Correct angle for keyboard
Osiris wrote
Trev trevbowdenHATdsl.pipex.com.invalid wrote How on earth did those typists manage with three hights of keys, no wrist pads and having to put even force behind the key's. **DID** they manage ? Corse they did. Or was injury not recorded ? That was a much later fad/hysteria. I can imagine, that in the early days, ppl were just dismissed when ill... Fraid not. |
#18
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Correct angle for keyboard
On Wed, 26 Jul 2006 10:15:40 +0100, Archie wrote:
Is there a generally-accepted best angle for the slope of a regular keyboard? One web page says this: ------------------ BEGIN QUOTE ----------------- "angle of the keyboard relative to the angle of the wrist. Most keyboards slope upwards from front to back, and this means that users bend their hands upwards when they are typing on the keyboard. This posture is called wrist extension, and we know that it is a source of injury risk for the wrist. Once the hand is extended beyond about a 15° upward angle, there is a very significant increase in the compression on the median nerve and other structures inside the wrist. So it is extremely important to type with the hands as flat as possible. From http://ergo.human.cornell.edu/AHTutorials/ckd.htm ------------------ END QUOTE -------------------- Which I interpret as being zero to 15 degrees. But my Compaq keyboard permits either: (1) flat or maybe 5 degrees (2) about 30 to 35 degrees. Undoubtedly there is a generally accepted etc. ISO has standards, and I'd say ISO is the nearest you can get to "generally accepted". However: the most imporantt thing is to educate people to start FEELING. Feel how you sit, does your back start to hurt, pain in the legs maybe ? Do your arms feel "folded" too strongly... How do the wrists feel after 15 mins of typing ? many people just keep plowing on during a work day, racing the rat race. Then: writsts are different from person to person. So why exactly 5 or 6 degrees tilt ? A general guideline... no more. In the early 80's we had IBM keyboards of maybe 10 cm THICK on the table. I was not hurt, because my work had enough variation: no full day of typing, but programming meant: type a line, think, type a line, think... Enough rest periods. I can imagine the wrist angle makes a difference. But that does not immediadtely translate in keyboard tilt. Subtract the angle of the lower arm first. I'd say, the first thing to do to avoid injury is to define the persons function description. And tune in to the feeling. Nowadays, typing requires so much less forcce than in the era of the Remmington typewriters. The effect is, that people keep going on, thinking that the physical load is less. But maybe load x time is the same as before... And the repetition is a lot higher.. BTW: forget about Rod Speed: he only has opinions, no arguments. He even thinks the VW beetle is a great car... go figure. Nothing to learn there. |
#19
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Correct angle for keyboard
I have never bothered with that crap, used to type with my feet up on the desk with detachable keyboards in my lap, and now I only ever use a full armchair with my feet up and the keyboard in my lap. And look at the crap that comes out of it now... |
#20
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Correct angle for keyboard
Osiris wrote:
I have never bothered with that crap, used to type with my feet up on the desk with detachable keyboards in my lap, and now I only ever use a full armchair with my feet up and the keyboard in my lap. And look at the crap that comes out of it now... Any 2 year old could do better than that pathetic effort. |
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