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    Sitting for Too Long Is Bad for Your Health

    Taking Even Short Breaks From Sitting Is Good for Your Heart, Waist
    By Siobhan Harris
    WebMD Health News
    Reviewed by Keith Barnard, MD

    Jan. 12, 2011 -- We all know that regular exercise is good for our health and too much sitting isn’t ideal. Now a new study suggests it’s not just the length of time we spend sitting down but the number of times we get up during that time that can influence our health.

    The study, published online in the European Heart Journal, examined the total length of time people spent sitting down and breaks taken in that time, together with various indicators of risk for heart disease, metabolic diseases such as diabetes, and inflammatory processes that can play a role in the blocking of arteries.

    It suggests that plenty of breaks, even if they are as short as one minute, seem to be beneficial.

    Take a Break to Slim Your Waist

    The Australian research found that long periods of sitting down, even in people who did a lot of exercise otherwise, were associated with worse indicators of cardio-metabolic function and inflammation, such as larger waist circumferences, lower levels of HDL ("good") cholesterol, and higher levels of C-reactive protein (an important marker of inflammation) and triglycerides (blood fats).

    However, the study also found that even in people who spent a long time sitting down, the more breaks they took during this time, the smaller their waists and the lower the levels of C-reactive protein.

    Genevieve Healy, MD, from the University of Queensland led the study.

    “The most significant differences were observed for waist circumference," she says. "The top 25% of people who took the most breaks had, on average, a 4.1 cm smaller waist circumference than those in the lowest 25%."

    The dangers of being too big around the middle are well-documented.

    According to the National Heart, Lung, and Blood Institute, high-risk waist circumferences are:

    • Over 40 inches for men.
    • Over 35 inches for women.

    Healy and her colleagues analyzed earlier U.S. data from nearly 5,000 people aged 20 and over.

    The participants wore a small device called an accelerometer, which monitored the amount and intensity of walking or running.

    It gave researchers information on sedentary time and breaks in sedentary time.

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