I was diagnosed with osteopenia about 5 years ago, and I've taken Evista for the last 4 years. After looking over the reviews at Amazon, I just ordered Better Bones, Better Body : Beyond Estrogen and Calcium by Susan Brown. Some time ago I read that cyclists and swimmers have the worst bone density. My personal belief is that it is because neither activity is a weight-bearing exercise, and you lose calcium during both through sweat. I buy a lot of packets of Propel with calcium, and use that for my water bottles, under the logic that if I'm sweating away some calcium, at least I can put some of it back.