I'm a kind of guy that sits in front of my computer most of the time. I'm an IT student in college and also a game programmer at home. I think I spend around 12 hours a day in front of a computer.
Also I don't do any special exercise such as fitness or other sport (yes, maybe you can call me a lazy bum
). But, because I'm a kind of "Night" people (my college is from 7 P.M. and I sleep at 3 A.M), and since there's no "cheap" public transport at night (only taxis and express train available), so I have to walk quite a bit when I'm go home from college. Well, maybe about 10-15 kilometres a day. And I think thinking also an activity that needs energy. So, well I think I'm quite healthy this way. Unless for my low blood pressure that always make me passed out when I'm too exhausted.