Do you guys type with your keyboards feet extended or flat?

[jonathanyu]

Always extend, if it has feet.  My keyboard right now is 12 degree, but I still want it to be higher.

[minh278]

Gotta have the feet extended. Flat keyboards, except my laptops chiclet keyboard, wreck my wrists and make it harder to reach the top keys.

[sidel]

never extended


depending on the angle I might even place something under the board to lift the front up to make it flatter.  I'm sure that's somehow a typing sin, but I find it more comfortable.

[tetraslash]

I've always left my keyboards flat as they feel weird to me while extended. Making the keyboard extended poorly angles my hands as well. Leaving the keyboard extended would probably hurt my hands much more quickly over the long run.

I suppose extended may be better for people who have their keyboard about a ruler's length away, and at a high elevation, so it doesn't angle the hands as much.

[Oobly]

....
The ideal case is to be in an environment where the home row on the keyboard is at or slightly below the level of your elbows, with the top of the keyboard flat or even slightly negatively sloped. However, even with a higher desk than that, it’s possible to avoid injury if you’re careful. I advise tilting your keyboard such that the key plate is parallel to your forearms when your wrists are straight. If your desk is tall relative to your chair, your elbows might end up bent fairly steeply, and the best keyboard tilt is also pretty steep; typing at a high desk puts a bit of extra load on your biceps, but luckily biceps are pretty strong.

I agree with everything you have posted on this topic, including the part about the ideal case, however you fail to mention one factor: Blood flow.

Forearm angles less than 90 degrees (ie high desk / low chair = raised hands) creates a situation with reduced blood flow to your hands during typing which is not ideal. I am quite sensitive to this, for instance I have great difficulty doing tasks with my hands raised above my head for extended periods. Elbows at 90 degrees or greater allows for greater bloodflow to the wrists and hands during typing which is to be desired.

For this reason, flatter / negative keyboard angle simply is more ergonomic.

This brings us to keycap profile designs, but that's a whole other topic of discussion

[chyros]

Comfort may be relative to each ones feeling, biomechanics, in the other hand will pass you the bill of stressful positions kept for long periods. That is a fact, and facts are undisputed.

Hmmm I guess, I was just curious about whether there is a correlation at all.

Scientifically speaking facts don't exist though, and everything is disputed ;P .

You meant debatable. )

Oops, sorry, you're right xD .

[jswill]

Comfort may be relative to each ones feeling, biomechanics, in the other hand will pass you the bill of stressful positions kept for long periods. That is a fact, and facts are undisputed.

Hmmm I guess, I was just curious about whether there is a correlation at all.

Scientifically speaking facts don't exist though, and everything is disputed ;P .

You meant debatable. )

Oops, sorry, you're right xD .

I would like to debate that 

[derzemel]

FLAT!!! always flat. Actually the normal angle that most keyboards have when sitting flat, is very comfortable to me. The same with the 0 degree rise of laptop keyboards.

I have sprained my left wrist 3 times and broken the right one once (mountain bike crashes and snowboarding) and I am also prone to develop Synovial Cysts (ganglion cysts) on both wrists (because of genetics and office work). Because of this I used to feel a tension when typing on an angled keyboard and sometimes that tension would transform into unbearable constant pain for about 2-3 days (I even woke up in my sleep because of it), then reverting back to tension. This is really affected my ability to use my hands (from typing, to biking).
According to orthopedic doctors, there is only one way of dealing with ganglion cysts: surgery. The catch is that after the surgery the cysts have a 50% chance of reappearing in one year.
Luckily, I have my grandmother who is knowledgeable in natural remedies and she suggested that I should go to a pharmacy and buy an ointment/cream with bee venom, camphor, propolis, marigold and few other things. This thing proved to be really effective as the cysts have disappeared and I have no more tension or pain.
Sadly I still cannot use keyboards with a high angle as I still feel some discomfort (so not many Korean customs to choose from )

If you're curios, this is what a ganglion cyst looks like: http://en.wikipedia.org/wiki/Ganglion_cyst
and this is the ointment/cream I have used: http://amhealth.biz/en/apitherapy/apireven-cream.html

[slaction]

I've always used flat.  I assume it's not great for my wrists since I don't have support, but I find my typing is better without wrist rests.

[Bomble]

Used to have feet extended, but I switched to flat and now that I am used to it, if I even try out any board with a considerable incline it just feels... wrong.