Breast-Cancer Prevention

A heart-pounding way to ward off the disease

A new study found that women who exercised regularly before turning 35 had a 23% decreased risk of developing breast cancer before menopause than did sedentary young women.

One theory: Working out seems to reduce the amount of estrogen in your body, and research indicates that the more estrogen a woman has, the greater her breast-cancer odds.

It's never too late to start indulging in moderate 30-minute cardio sessions at least 3 times a week. Try biking around your neighborhood; taking a long, brisk walk; or popping in a workout DVD to do in front of the TV.

- from Cosmopolitan Magazine, October 2008