|  |  | July 24, 2009  Exercise is not only good for your heart, brain and waistline. New findings suggest that exercise can also reduce a woman's overall risk for cancer, but only if you get enough sleep.
James McClain, a Ph,D. in cancer prevention at the National Cancer Institute and primary author of the study reports, "Greater participation in physical activity has consistently been associated with reduced risk of cancer incidence at several sites, including breast and colon cancers." However, "short duration sleep appears to have opposing effects of physical activity on several key hormonal and metabolic parameters, which is we why looked at how it affected the exercise cancer risk relationship."
This novel study examined the interaction of exercise and risk for cancer and how inadequate amounts of sleep can undo all the benefits exercise can achieve.
5968 women who were 18 years or older and without any prior history of cancer were tracked through the Washington county Cancer Registry and Maryland State Cancer Registry for almost 10 years. Researchers followed the women's physical activity energy expenditure, sleep duration and incidence of overall cancer...
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