Women post-menopause are so unbelievably susceptible to osteoporosis and osteopenia with the loss of estrogen. Unfortunately, many women in that situation are not getting hormone replacement therapy, and so they're doubly susceptible to it. I think there's just a cultural belief that women don't need to lift weights; and if they do, it's very light. But the truth of it is you really need to lift heavy things to make your bones stronger.