Narrator: This is Science Today. Bone density stays level throughout women's twenties and early thirties, but by the time a woman is in her mid to late thirties, these levels begin to trail off and significantly plunge by the time menopause hits. Dr. Deborah Sellmeyer, director of the University of California, San Francisco's Osteoporosis Center, says that's when women usually start debating whether or not to start hormone replacement therapy. But, she says there are other options, other than medication.
Sellmeyer: There are many things you can do. Staying active - any kind of weight bearing exercise; we like to encourage people to walk. If you're in good health and very active, things like tennis or weight lifting - anything that's going to make those muscles and bones work - is going to preserve your bones.
Narrator: Sellmeyer says this can be done without having to join a gym or going to extremes.
Sellmeyer: You don't have to spend a lot of money. If you're sitting at home watching TV, get some canned goods out of the cupboard and just start lifting them. You could do it very cheaply, you could do it at home with out a whole lot of effort.
Narrator: For Science Today, I'm Larissa Branin.