As we age, our bodies naturally lose lean muscle mass and our bones become less dense. For women, this is even more of a problem. Not only do women have thinner and less dense bones than men, but women are also more likely to develop osteoporosis. For women, bones can become even weaker before or during menopause because of a decrease in estrogen, which is the hormone that helps keep bones strong. According to the National Osteoporosis Foundation website, "Of the estimated 10 million Americans with osteoporosis, about eight million or 80% are women. Approximately one in two women over age 50 will break a bone because of osteoporosis, and a woman’s risk of breaking a hip is equal to her combined risk of breast, uterine and ovarian cancer."