Even if you exercise, the more hours a day you sit, the greater your risk of early death
http://www.menshealth.com/mhlists/be_fit/printer.php
It was linked in the article. It is very interesting, even if you workout some of these might be hard to obtain.
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In 2009, Katzmarzyk studied the lifestyle habits of more than 17,000 men and women and found that the people who sat for almost the entire day were 54 percent more likely to end up clutching their chests than those who sat for almost none of the time.