Crazy it is to sit steadily for 8 hours for even a fresh out of the college guy like me. I am currently into the training phase, but my employers are not providing the training. Nevertheless I have to sit 8-9 hours no matter what! I don't find it productive at all, I might read all day about things but that sure ain't propelling me anywhere ahead in work. Scenario is that after a certain hours of sitting you do loose the consciousness quotient. Might as well be that it drops only by a percentage. According to some people here, they do see their colleagues working for 8-9 hours daily, whereas what they don't know is that they are paid to do so just like you are, only difference being that they are more afraid stand out and relax during work as it might decrease their chances of a salary hike.