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Reviewed By: Louise Chang,
SOURCES: Medical Reference from Medstar Television. The Vegetarian Resource Group. American Obesity Association. Weight Control Information Network.
© 1999-2011 Medstar Television
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Conventional wisdom has led us to believe we have to rev our heart up like this... So we can lower our bad cholesterol in order to prevent this... But many of us don't manage to find time for a high-intensity workout. Does that mean we're at higher risk for heart disease?
They thought I had a silent heart attack.
Lee August was lucky. He avoided heart surgery because he made significant lifestyle changes. A healthier diet, a medicine that lowers his cholesterol and a regular routine of moderate exercise. A study at Duke University suggests it's not the intensity, but the amount of exercise.
I think we have good evidence that regular, modest levels of physical activity that are aerobic, so moving our body, whether it’s walking, bicycling, swimming, jogging, playing tennis— these have favorable effects on our blood vessels. They can have modest effects on our cholesterol by themselves.
Cholesterol is an energy-rich fat particle in the bloodstream. Working out, it appears, changes these into larger size particles. So in this case, bigger is better.
We think that the smaller these particles are the more likely they are to cause blood vessel disease. The larger they are, the fluffier they are, we think the more protective they might be.
Most Americans can lower bad cholesterol with moderate exercise several times a week and a diet rich in fiber, vegetables and Omega-three oils. Those who are genetically predisposed to higher cholesterol may also need to take a cholesterol-lowering drug or statin.
The majority of cholesterol problems in this country are due more to diet and lifestyle and environment than genes.
For WebMD, I'm Damon Meharg.
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