This question is quite simple: Arms cannot appropriately rest on a keyboard while typing. Even if you are not aware that you are doing it, it will completely ruin your whole body posture. Yet, many people still do so when they sit at the computer. The reason behind this is some people think it’s the proper way to do things. That’s why we have put together the facts to let you know why arms resting on a desk while typing is just not a good idea.