Obviously, there are a number of tricks to help you improve your ergonomics. Choose an office chair that you can completely adapt to your body. Place your feet flat on the floor and don’t press your legs into your chair. A springy, flexible backrest is better than a fixed one. Finally, position your screen at eye level to prevent a stiff neck.
Try not to sit down all day long. Instead, get up once in a while to walk up to your colleagues’ desks rather than emailing them. Sitting for prolonged periods of time affects your circulation, which makes it harder for waste products to be removed and this, in turn, results in stiff muscles.