Heart Health

Should you worry about your waistline?

Having a large belly is dangerous to heart health. Learn if you're at risk — and what to do about it.

By , Executive Editor, Harvard Heart Letter

illustration with pointers indicating the difference between subcutaneous fat and visceral fat in the abdomen

Extra padding around your midsection goes by many different names — a spare tire, muffin top, or love handles. Too much of any type of fat isn't healthy, but some forms are worse than others. The flab you can pinch between your fingers is known as subcutaneous fat, which lies just beneath the skin. A more worrisome type of fat lies deep within the abdominal cavity, padding the space between your organs (see illustration).

Known as visceral fat, it does more than add inches around your waistline; it also raises your risk of cardiovascular problems. "Growing evidence suggests that your waist circumference is a better predictor of heart disease than your body mass index," says Dr. Osama Hamdy, medical director of the Obesity Clinical Program at Harvard-affiliated Joslin Diabetes Center. Body mass index (BMI), an indirect estimate of body fat based on height and weight, doesn't distinguish between the different types of fat. "People can have what's considered a healthy BMI but still have a large belly and visceral fat," says Dr. Hamdy.

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About the Author

photo of Julie Corliss

Julie Corliss, Executive Editor, Harvard Heart Letter

Julie Corliss is the executive editor of the Harvard Heart Letter. Before working at Harvard, she was a medical writer and editor at HealthNews, a consumer newsletter affiliated with The New England Journal of Medicine. She … See Full Bio
View all posts by Julie Corliss

About the Reviewer

photo of Christopher P. Cannon, MD

Christopher P. Cannon, MD, Editor in Chief, Harvard Heart Letter; Editorial Advisory Board Member, Harvard Health Publishing

Dr. Christopher P. Cannon is editor in chief of the Harvard Heart Letter. He is a professor of medicine at Harvard Medical School, and senior physician in the Preventive Cardiology section of the Cardiovascular Division at … See Full Bio
View all posts by Christopher P. Cannon, MD

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