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Too Much Sitting Linked to Fat Buildup Around the Heart
Date:11/9/2012

By E.J. Mundell
HealthDay Reporter

THURSDAY, Nov. 8 (HealthDay News) -- All those hours Americans spend in their office chairs or on their sofas may be packing on a particularly unhealthy form of fat around the heart, a new study suggests.

What's more, the fat stayed in place even when people undertook regular exercise, according to a study reported this week in Los Angeles at the annual meeting of the American Heart Association.

CT scans of more than 500 older Americans found that excess time spent sitting "was significantly related to pericardial fat around your heart," said study lead author Britta Larsen, a postdoctoral researcher in the department of cardiovascular epidemiology at the University of California, San Diego.

There have been numerous large studies recently suggesting that when it comes to its deleterious health effects, sitting is not just the absence of physical activity -- it has effects on the body that go beyond lack of exercise.

According to Larsen, that means that "even if you run every day but then you sit for eight hours a day, the sitting is still doing something bad for your health." She also noted that studies have found sitting to be detrimental to health even after scientists factored out excess weight gain.

"So, we wanted to see if sitting was related to the distribution of fat, because different types of fat are worse than others," Larsen said.

The study looked at data on 504 Californian adults, average age 65. In particular, Larsen's team examined CT scan data that showed how much of certain types of body fat were deposited in each participant's body.

"We looked at subcutaneous fat, which is stuff on the outside [for example, a "pot belly"]; then visceral fat, which is around your organs; intramuscular fat, which is actually in your muscles; intrathoracic [chest cavity] fat; and pericardial fat, which is around your heart," Larsen said.

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