A new study found that among 190 men who underwent biopsies for possible prostate cancer, those who exercised moderately were less likely to be diagnosed with this common type of cancer among men. Moderate exercise is equivalent of three to six hours of walking per week.
All these men were two-thirds less likely to have positive biopsy of this cancer, compared with their sedentary counterparts. In addition, men who got the equivalent of one to three hours of walking each week had an 86 percent lower chance of having an aggressive, fast growing form of the cancer.
Dr. Stephen J. Freedland, of the Duke University Prostate Center and the VA Medical Center in Durham, North Carolina, said, "If you need one more reason to exercise, this could be one."
He also told Reuters Health that a number of studies have looked at the relationship between exercise and prostate cancer, and while most have pointed to a protective effect, about one-third have found no association.
After the researchers accounted for a number of other factors, like age, weight and race, exercise itself remained linked to a lower risk of prostate cancer.
There is also research showing that the connection is biologically plausible. For one, exercise has been shown to lower testosterone hormone level in the bloodstream and other hormones that may stimulate prostate tumor growth. Exercise also believed could stimulate the body's natural antioxidant mechanisms and the immune system, both of which may help prevent the development of prostate cancer.
Source: Moderate exercise may lower prostate cancer riskPerhatian:
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