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MINNEAPOLIS - We know exercise has been shown to lower breast cancer risk, but now, a new study conducted by University of Minnesota researchers shows how it works.

The study, published in Cancer Epidemiology, Biomarkers & Prevention, a journal of the American Association for Cancer Research, says that exercise actually changes the way women's' bodies metabolize estrogen and create other metabolites known to lower breast cancer risk.

Breast cancer researcher, Dr. Tufia Haddad of the Mayo Clinic, commented on the study.

"The science that drives that, the actual biology has never been understood," said Haddad. "So, Dr. [Mindy] Kurzer's work is truly groundbreaking in that regard and helps us to understand how estrogen metabolism correlates with exercise and how those two things together might explain why exercise lowers breast cancer risk."

You can get some exercise this weekend at the Twin Cities Race for the Cure at the Mall of America. It's this Sunday and you can stop by and visit us at the KARE Corner.

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