Harvard Heart Letter

Too much sitting linked to heart attack and stroke -- even if active

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Don't spend workdays in your chair and evenings on the couch, even if you exercise every day.

Here's news you shouldn't take sitting down: the more time you spend sitting each day, the greater your risk of heart disease. A new study suggests that people who sit for 10 or more hours a day are more likely to have a heart attack or stroke than those who sit five or fewer hours each day.

Those who sat for 10 or more hours a day had an 18% higher risk than those who sat for five hours or less, regardless of their level of physical activity. But exercise made a big difference. The least active women in the study who sat at least 10 hours a day had a 63% higher risk than active women who sat five or fewer hours a day.

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