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.
When your cortisol levels are through the roof, it triggers the release of insulin, and this is where things go awry. Initially, the ‘fight-or-flight’ response shuts down your digestive system so you can deal with the “threat”, like a very hungry lion or, more realistically, heavy traffic on your way to work. Once the danger has passed, your body seeks to replenish the hundreds of calories you burned fighting to the death/swearing at rush hour traffic and makes you ravenously hungry.
While many people turn to artificial sweeteners in a misguided attempt to whittle their waistlines, those fake sugars are likely to have the opposite effect. According to researchers at Yale, artificial sweeteners are actually linked with an increased risk of abdominal obesity and weight gain, possibly because they can trigger cravings for the real stuff and spike insulin levels in a similar fashion to real sugar.
Visceral fat is the hard body layer of fat that lies deep within our abdominal cavity and surrounds a number of internal organs such as the lungs, heart, intestines, liver, and pancreas. Visceral fat produces an inflammatory substance called cytokines that can damage these organs. Too much visceral fat can contribute to many health problems such as glucose intolerance, hypertension, coronary artery disease and type 2 diabetes.
This is what's known as insulin resistance. Basically, when your body doesn't respond well to insulin, it actually makes more of the stuff, according to the National Institute of Diabetes and Digestive and Kidney Diseases. And that can lead to fat storage, especially around the middle of your body. That's where protein comes into play: A diet high in protein may protect you against insulin resistance, says Aronne.
Noam Tamir, C.S.C.S, founder of TS Fitness, also says that metabolic resistance training and high-intensity interval training is a solid way to reduce fat all over, including belly fat. “These [types of exercise] help to burn calories during the workout, and they also give you that after-burn effect,” he says. “Plus, they help to change your body composition by increasing your muscle mass.”