Certain jobs require long hours of standing or sitting. It doesn’t seem like sitting would be hard on one’s back, but in fact, sitting for long periods of time can place a great deal of stress on your lower back and can create back troubles.
Sit all the way back in a firm-back chair with your back erect. Keep your head and shoulders erect. Your shoulders and upper back should not be rounded. Don’t slouch! Make sure your working surface is at the proper height so you don’t have to lean forward. If you have an ergonomic chair, adjust it correctly.
Take exercise breaks from desk work by getting up, moving around, stretching, and performing a few back exercises in the standing position.