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Step 5: Stay active and maintain a healthy weight.

Maintaining a healthy weight and exercising regularly also play roles in preventing cancer. Obesity may be a risk factor for cancers of the prostate, colon, rectum, uterus, ovaries and breast. Physical activity is an important part of controlling your weight. And it may lower your risk of some kinds of cancer, including breast cancer and colon cancer. Try to be physically active for 30 minutes or more on most days of the week. Your exercise session can include such low-key activities as brisk walking, raking the yard or even ballroom dancing. Safe exercise programs exist for just about everyone. Your doctor or physical therapist can help design one for you.