Can too much running cause colon cancer? New study raises questions about extreme training

Can too much running cause colon cancer? New study raises questions about extreme training


After seeing three marathoners with colon cancer in a span of about six months, oncologist Dr Timothy Cannon could not help but wonder if it was more than a coincidence.

Could there be a connection between the cancer and the gastrointestinal (GI) problems many runners experience during long events?




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