Eternal Sitting

I wonder if there is study out there that measures life expectancy according to how much one sits or how much one sits in front of a computer. There must be a correlation because I honestly feel the life being sucked out of me the longer I sit here. The irony of all this school work is that by the time I'm actually finished my masters, there is no way I will want to go near a computer to do any work. I will then have to resort to a new career path related to climbing mountains or scuba diving or anything that does not require such long periods of sitting for extended days, weeks and months on end. All this sitting in front of of a computer is stealing me of energy and creativity and making my body rigid and saggy all at once. Yes, I chose this path.......must keep telling myself that. Oh man....... I try to live in the moment but I really can't wait for this course to be over.