Our back doesn't like when we spend a lot of time sitting, standing or walking in upright position. How to keep the back straight without starting to crawl on all fours? We all remember how teachers at school were saying about sitting upright. As we grew older, our colleges advise us to go to a back specialist. Many of us do not take the advice. Later, we wonder at unbalanced shoulders, ribs sticking out abnormally and sharp pains in the back. What can we do about it? Full story