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Updated Monthly - March/2004
Fat Distribution Is Key To Health Risk

Everyone knows that being overweight is unhealthy, but the key is where the fat is distributed. During the past 20 years researchers have learned that people with apple-shaped bodies (fattest in the abdomen) have a greater risk of heart disease, diabetes, and stroke than those with pear shapes (fattest in the hips, buttocks, and thighs). Some studies also suggest that post-menopausal women who store fat in the midsection and upper body may be at increased risk for breast cancer.

Men are more likely than women to store excess fat in the midsection and develop a beer belly, whether they drink alcohol or not. Women typically store fat lower on the body, which is less of a health hazard (some studies, in fact, have found that this kind of fat may even be protective in some ways). Because of these gender differences, sex hormones probably help determine where fat is deposited. Still, women can be apple-shaped, too, with all the risks that entails. After menopause, in particular, many women start to accumulate more fat around the waist. Heredity and activity level also affect your body's shape.

Why is it bad to be apple-shaped? Abdominal obesity increases the risk of having high LDL (bad) cholesterol, triglycerides (fats in the blood), blood pressure, and blood sugar, as well as insulin resistance and low HDL (good) cholesterol. This cluster of problems is now known as the metabolic syndrome, which in turn increases the risk of diabetes, coronary artery disease, stroke, and some cancers. Abdominal obesity has also been linked to elevated C-reactive protein (a sign of inflammation) and blood clotting abnormalities, both of which play a role in cardiovascular disease.

While fat in the hip/thigh region is mainly stored just under the skin, fat in the midsection is also stored deeper inside the body, in and around the liver and other organs. Fat cells deep in the abdominal area apparently behave differently than fat cells under the skin of the thighs and hips. In scientific lingo, these fat cells are more metabolically active. They may release different substances, for example, more fatty acids which could explain some of the adverse effects. They may directly affect the functioning of the liver. The potential increase in breast cancer risk may be due to estrogen production associated with abdominal obesity.

Are you an apple?

To evaluate your risk based on your fat distribution, determine your waist-to-hip ratio (WHR) as follows. Measure your waist at the navel, then your hips at the greatest circumference around the buttocks. Then divide the waist measurement by the hip size. A WHR greater than 1.0 for men and 0.8 for women indicates increased risk. That means that the circumference of a man's waist shouldn't exceed that of his hips; a womans waist should measure no more than 80% of her hips.

A simpler but accurate gauge is just to measure your waist: more than 40 inches in men, and 35 inches in women, is a sign of significant abdominal obesity and increased health risks, regardless of height. But those are not magic numbers: there's some evidence that risk starts to rise before those cutoff points.

What to do about that spare tire

There is no way to spot reduce that is, lose fat in just one area, such as around your waist. You have to exercise your whole body - walk briskly, ride a bike, lift weights and thus burn calories. To shrink your waist, reduce your calorie intake too, preferably by cutting down on the saturated fat in animal products, which has been linked to abdominal obesity. And here's another reason to avoid the trans fats found in so many processed foods: a high intake tends to increase fat accumulation in the midsection, according to a recent study. One piece of good news: abdominal fat tends to come off faster than other fat.

And by the way: New weight-loss supplements from Dr. Phil McGraw feature one formula for apple-shaped people, another for pear-shaped. This is just a marketing gimmick. There's no evidence that body shape determines nutritional needs or that either of these expensive supplements would cause weight loss.


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