5 Diet Myths That Pack on Pounds

PHOTO: Here are five of the most pervasive diet-related rumors and the real scoop on how to hit your goal weight for good.
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Sorry, Journey, but it's finally time to stop believing—in weight loss myths at least. Believing popular misconceptions can keep you from taking the right course of action to reach your goals, says Julia Valentour, MS, program coordinator and media spokesperson for the American Council on Exercise. Blaming a plateau (or a gain) on any of these half-truths will keep you stuck in your rut and derail your motivation.

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Here, 5 of the most pervasive diet-related rumors and the real scoop on how to hit your goal weight for good.

Diet Myths That Pack on Pounds

First, let's tackle the myth that a pound of muscle weighs more than a pound of fat. A pound is a pound is a pound—whether it's made up of muscle or fat. That said, muscle is denser than fat and takes up less room, so two women who weigh the same can look much different if one has a higher ratio of lean muscle mass to fat, says Valentour. "Muscle weight is a good weight because you look firmer, smaller, and more fit. It's also more metabolically active, so just having more muscle will boost metabolism throughout the day to help keep you leaner."

It's important to incorporate strength training into your routine so you burn calories at an optimal rate all day long—and using heavier weights could help maximize your efforts. Researchers at the Washington University School of Medicine in St. Louis found that working out with heavy weights even for as few as 3 to 6 repetitions increased exercisers' sleeping metabolic rate—the number of calories burned overnight—by nearly 8%. That's enough to lose about 5 pounds in a year, even if you did nothing else!

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Diet Myths That Pack on Pounds

Would be nice, right? But that's not how it works if you're trying to lose weight, unfortunately. "You can outeat your workout," says Valentour. Even though you burn calories and fat when you exercise, it's often not as much as you think—or what the readout on the treadmill tells you.

Valentour recommends eating 250 fewer calories per day and aiming to burn an extra 250 calories a day; that creates enough of a calorie deficit to achieve an average weight loss of a pound a week.

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Diet Myths That Pack on Pounds

Okay, this one has some basis. Biologically, men are built with more lean muscle mass (the compact, tight muscles that keep metabolism humming) than women are—meaning his metabolism is working at a 5 to 10% higher rate (even if he's the same height and weight as you) when you're lying on the couch together. Annoying, isn't it?

Another biological challenge women face is that we generally have more body fat than men do, and our bodies are more inclined to store it. On top of that, women lose about 1/2 pound of calorie-burning muscle mass a year during perimenopause and sometimes a pound a year during menopause. With the deck stacked against you, why bother trying to fit back in your skinny jeans?

You can do something about these problems, but it's going to take some work—and sweat. Add strength training to your fitness routine at least twice a week to shed fat and build lean muscle mass that will fire up your resting metabolism.

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Diet Myths That Pack on Pounds

Ever since you learned what a calorie is, you've been told that they're all alike: Whether you eat 500 calories' worth of celery stalks or cake, your body will burn or store them equally, right? Wrong. New science shows that when it comes to weight loss, calories are nowhere near alike.

Some foods take more work to eat—and therefore burn more calories while you're digesting them. Just the act of chewing fruits, vegetables, whole grains, and lean cuts of meat can increase your calorie burn by up to 30%! And then your stomach and intestines do their jobs. In a Japanese study, researchers found that women who ate the foods that required the most work had significantly slimmer waistlines than those who ate the softest, easiest-to-eat foods. The fiber and protein in such foods take so much effort to digest that your body doesn't absorb some of their calories.

The Active Calorie Diet is a smart new plan from Prevention magazine that takes advantage of all the new knowledge about calories. By choosing more Active Calories and fewer processed foods, you'll set your fat-burning engines on high all day long so you'll lose more weight—without feeling hungry.

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Diet Myths That Pack on Pounds

Fat-free products are so-o-o over. There's nothing special about fat that packs on pounds: Getting enough fat in your diet—the Institute of Medicine recommends that it make up 20 to 35% of calories—is essential for good health, but the type of fat matters.

Monounsaturated fats—MUFAs (pronounced MOO-fahs), for short—come from the healthy oils found in plant foods such as olives, nuts, and avocados. A report published in the British Journal of Nutrition found that a MUFA-rich diet helped people lose small amounts of weight and body fat without changing their calorie intakes. Another report found that a breakfast high in MUFAs could boost calorie burn for 5 hours after the meal, particularly in people with higher amounts of belly fat. Pair these delicious healthy fats with a reduced-calorie eating plan and you'll lose weight and reduce belly fat.

Limit saturated fats and avoid trans fats in your diet. Both kinds can cause health problems.

Check Out 5 More Diet and Fitness Rumors That Slow Weight Loss

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More from Prevention:

10 Fitness Myths That Are Holding You Back

20 Biggest Health Excuse Roadblocks/a>

50 Ways To Lose 10 Pounds

What Do Doctors Really Eat?

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