Can exercise reduce my risk of cancer?

The science has weighed in on the effect of exercise on cancer. Women who moderately exercised 1.5 hours per week had a 50 percent reduction in cancer risk. There are lower rates of colon cancer in individuals who exercise regularly.

Researchers examining 74,000 women enrolled in the Women's Health Initiative study recently found that exercise reduced the risk of breast cancer regardless of age. Women who exercise regularly have lower rates of breast cancer. Michelle Holmes, M.D., Ph.D.

Assistant professor at Harvard Medical School, reported a study in the Journal of the American Medical Association on the benefits of exercise on breast cancer. Walking three hours a week at an average pace of 2 to 2.9 miles per hour cuts the risk of dying from breast cancer in half. Even a little exercise -- one to three hours a week -- cut the risk of breast cancer death by 20 percent.

These studies are very encouraging, not only for women with breast cancer but for everyone with or without cancer. We are continually being told by studies we must exercise to live a long and healthy life.

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