It's my understanding that the exercise needs to be weight-bearing as opposed to having impact. I did find walking included as a weight-bearing exercise in this article from the National Institutes of Health: http://www.niams.nih.gov/bone/hi/prevent_fracture.pdf. I believe that using an elliptical trainer would also fall into the weight-bearing category.

My doc also recommended calcium + D supplements twice a day. I use a generic supplement that contains 600 mg of calcium + 200 IU of vitamin D.

--- Denise