The most dangerous thing you’ll do all day

by BILL PHILLIPS

It all started last summer, when Assistant Editor Maria Masters came across a shocking study in the Medicine & Science in Sports & Exercise (one of dozens of research journals we comb each month as we put together the magazine). Scientists at the Pennington Biomedical Research Center in Louisiana analyzed the lifestyles of more than 17,000 men and women over about 13 years, and found that people who sit for most of the day are 54 percent more likely to die of heart attacks.

That’s right—I said 54 percent!

Masters immediately called the lead researcher at Pennington, a professor named Peter Katzmarzyk. Turns out, this wasn’t the first study to link sitting and heart disease. Similar research actually dates back to 1953, when British researchers found that (sitting) bus drivers were twice as likely to die of heart attacks as (standing) trolley operators.

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(Thanks to reader)