What to do if you have backpain due to many hours of sitting although going to the gym between those hours?
I mean that are there any good (rather finnish if possible) sites on computer ergonomics? I know that one needs to keep about rest every one hour, but how long and what should I do? I know what I can do, but how long? And then this backpain is focused on middle back and I notice that when I sit straight, this pain occurs, but when little leaning against back, it does not seem to be so much pain than previously.