Narrator: This is Science Today. Studies have shown that among the nation's inner-city African-American women of childbearing age, over half are obese. This puts them at greater risk to develop serious health problems as they reach middle age. Judith Stern, a nutrition professor at the University of California, Davis, says one of the big problems is a lack of exercise.
Stern: And what I'd say is, if you live in the inner-city, there have to be group activities. It's successfully been done in Boston, it's a 'stick together' campaign where you walk a little bit more, you eat a little bit better and you take a little off.
Narrator: And in post-menopausal women, Stern says an increase in physical activity can help prevent 'middle-age spread', which often affects this age group and has been associated with an increased risk for heart disease and cancer. So once again, Stern says group activity may be the way to go.
Stern: Do it with your friends, do it with your children - in fact, do it with your grandchildren. Kids are really happy for you as a parent or a grandparent to be a little healthier.Narrator:For Science Today, I'm Larissa Branin.