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在线翻译:
szdaily -> Lifestyle -> 
Cancer risk from sitting higher for women
    2015-07-17  08:53    Shenzhen Daily

    YOU’VE heard it repeatedly — sitting is the new smoking. But while experts agree we could all stand to get off our butts a little more, new research on the topic has a startling discovery: Women have a higher risk of developing cancer from sitting.

    A study of 146,000 men and women published in the journal Cancer Epidemiology, Biomarkers & Prevention discovered that women who spend more of their downtime sitting are at a 10 percent higher risk of developing cancer, specifically multiple myeloma, breast, and ovarian cancers. Men, on the other hand, had no increased risk of developing cancer after sitting.

    This isn’t the first research that found women may be more at risk for developing cancer from sitting.

    The American Cancer Society’s Cancer Prevention Study II discovered that women who sat for six or more hours a day had a 37 percent greater risk of death compared to those who sat for three hours or less a day. But men only had a 17 percent greater risk.

    The disparity was even greater for those who didn’t exercise: Women who were inactive and sat for long periods of time were at a 94 percent higher risk of developing cancer, while men were at a 48 percent higher risk.

    What’s going on here?

    It may all be due to estrogen, says medical oncologist Homayoon Sanati, medical director of the Memorial Care Breast Center at Orange Coast Memorial Medical Center in Fountain Valley, California.

    Ovarian and breast cancers are related to an increase in the production of estrogen. Sitting can increase the production of estrogen in a woman’s body through the development of extra fat cells that happen when a woman has a sedentary lifestyle.

    Estrogen promotes the growth of breast and ovarian cells and, when more cells grow, there is an increased risk that those cells can have genomic errors that may lead to the development of cancer.

    Researchers still aren’t sure how much sitting is safe. But Sanati says more movement seems to be better. And, if you have to sit for a long period of time, get up and walk for a few minutes after a half hour before sitting down again — it could save your life. (SD-Agencies)

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