Too Much TV Time May Hurt Your Heart

Spending your time gazing at a TV or computer screen can hurt your heart and shorten your life -- even if you exercise at other times. A study found that people who spent at least four hours each day watching TV, playing video games, or using a computer for fun were more than twice as likely to experience a heart attack or stroke.

Heavy TV watchers and computer users were also found to be about 50 percent more likely to die of any cause over the course of the four-year study.

CNN reports:

"The real culprit may be what people tend to do during those activities: sit. Why is sitting harmful? It's not entirely clear, but animal studies have shown that prolonged sitting slows down the action of an enzyme (lipoprotein lipase) that breaks down fats in the blood, such as cholesterol and triglycerides."

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