How bad can your calorie-free Diet Coke habit be for your belly? Belt-bustingly bad, researchers say. A study in the journal Diabetes Pro found that people who drank two or more diet sodas a day had waist-size increases that were six times greater than non-drinkers. Diet drinks are loaded with deceptively sweet artificial sweeteners, which, researchers say, trick the metabolism into thinking sugar is on its way, spike insulin levels, and shift the body from a fat-burning to a fat-storing state.
For years, diet experts beat the “multiple small meals a day” drum—an eating rhythm purported to “stoke the metabolic fire!” Now, some researchers are singing a different tune. A study published in the journal Hepatology found that snacking between meals contributes to increased abdominal fat. Researchers say the findings suggest three balanced meals may be the way to go. Try weaning yourself off the snack wagon by nixing your morning nibble first. Research suggests mid-morning snackers tend to consume more throughout the day than afternoon snackers.
Dietary fats are kind of like lovers. Some of them make you a better person, and others—as you often discover too late—are catastrophically bad for your health. The good news is, unlike shoddy boyfriends, dietary fats come with red flags. The absolutely worst match for your apple-shaped figure? Saturated fats. A study published in the journal Diabetes found that while unsaturated fat can help reduce abdominal fat, saturated fat can increase waist size. Saturated fats, like the kind you’ll find in baked goods and red meat, “turn on” certain genes that increase the storage of fat in the belly, researchers say. Polyunsaturated fats on the other hand, activate genes that reduce fat storage and improve insulin metabolism. At about 13 grams per one ounce serving, walnuts are one of the best dietary sources. Sprinkle a handful on your morning oats or entree salad for belly-busting benefits.
Open any fitness magazine, and it’s clear: high intensity interval training (HIIT) is having a bit of a moment. But when it comes to your shrinking your belly, the start-and-stop exercise strategy won’t get you anywhere … other than into a larger pair of pants, researchers say. A study published in the Journal of Obesity found people who performed interval training on an exercise bike for 24 minutes three days a week, actually gained 0.7 percent abdominal fat over a 12-week period. Meanwhile, those on the same dietician-regulated diet, who performed traditional aerobic exercise—45 minutes of continuous moderate cycling three days a week—lost nearly 3 percent of their abdominal fat over the same 3-month period. The study authors did notes that HIIT improved fitness, but suggest that the only evidence to support interval training as an efficient weight loss method was research using young people who were already lean and healthy. Remember: Workouts are only half of the equation
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