Your confusion is understandable - Western medicine and our societal habits haven't a clue how to function in support of our bones. We never walk carrying loads on our heads; all the societies that do NEVER experience osteoporosis; plus, we're not told in our youth what precautionary measures we could take to build our bones to a really great strength when we're young enough to do so. So, we suffer in our older years for all these lacks. Here we are adrift on our n"star!"