Researchers at the United States' National Cancer Institute analyzed 14 previous studies and found physical activity cuts the risk of endometrial cancer by 20 percent to 40 percent when compared with sedentary women. The study was published online today in the British Journal of Cancer. It was paid for by the National Cancer Institute. Scientists have long known that exercise cuts the risk of some cancers, including of the breast, colon, esophagus and kidney. Excess body fat sometimes leads to higher hormone levels, which in turn may elevate the risk of cancer. "We already knew that maintaining a healthy body weight is an important way to reduce the risk of womb cancer, but our study showed that physical activity has a protective effect of its own," said Steven Moore of the National Cancer Institute, the study's lead author.
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