The internal and external obliques, which I like to call "nature's girdle," are located at the sides of the rectus abdominis. They are the muscles you use when you bend sideways at the spine or twist at the waist. They also contract to compress the abdomen, so you should work them just as hard as you work the rectus abdominis. Adding a twist to crunches works, as well as dumbbell side bends, but be careful not to use any jerky motions, especially if you've had back problems.
Science backs these ideas up when it comes shedding belly fat: In one study published in The Journal of Nutrition, researchers had overweight men and women follow a high-protein diet (30 percent protein, 40 percent carbs, and 30 percent fat) or a high-carb diet (15 percent protein, 55 percent carbs, and 30 percent fat). After one year of weight loss and maintenance, they found that the high-protein group experienced a 21 percent greater weight loss and 27 percent greater body fat loss on average than the high-carb group.
Carbohydrates are a touchy subject: while some blame them for all fat gain, it’s the type of carbs you eat that’s key. A 2011 study out of the University of Alabama found that a diet that slightly cut back on carbs, and which comprised mostly low-GI carbohydrates, lost more deep abdominal fat than those who ate a lower-fat diet. GI stands for glycemic index, a measure of how fast carbohydrates supply your body with energy: high-GI foods make you spike then crash, while low-GI foods provide a slow burn.
Packaged foods, partially hydrogenated oils and enriched flours are not your friends. Above all, remember this one word: transfats. Avoid it at all costs. Researchers have found that the transfats found in margarine, packaged cookies, crackers and pasta increase fat in your midsection, and can actually redistribute fat from other parts of the body to the belly. For more flat-belly foods, click here.
Or skip your favorite early-morning show—whatever it takes to grab a few more minutes of sleep each day. When researchers at the University of Chicago studied men who were sleep-deprived, they found that after just a few days, their bodies had a much harder time processing glucose in the blood—a problem common in overweight diabetics. When the individuals returned to a more normal seven to eight hours of sleep a night, however, their metabolisms returned to normal.
When it comes to losing belly fat, using any old oil just won't do. Medium-chain triglycerides (or MCTs), like coconut oil or avocado oil, are a unique form of fat that require less energy and enzymes to be digested. "And unlike other dietary fats, MCTs don't get stored as fat in the body; they get burned for energy," says Samit. Which means you get a faster metabolism and tons of energy to power-through your to-do list.
Visceral fat—a type of fat that lies deep inside your abdomen and surrounds your internal organs—is linked to a whole slew of terrifying health problems like heart disease and type 2 diabetes, according to the Mayo Clinic. Even scarier: According to the National Heart, Lung, and Blood Institute (NHLBI), your risk of those health issues increases even more if your waist size is greater than 35 inches for women and 40 inches for men.
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