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7 Weight-Loss Myths That Can Sabotage Your Progress

For every great piece of weight-loss advice out there, it seems there are no fewer than a dozen horrible ones—myths based on questionable pseudoscience, misinformation, and straight-up sales gimmicks.

These myths do more than sabotage your weight-loss efforts—they may even put your health on the line. We asked seven top trainers and nutritionists to ID the biggest myths keeping people from hitting their healthy-living goals. Plus, simple strategies for weight loss that lasts.

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Myth #1: Eliminating Whole Food Groups Can Help You Lose Weight

Whether it’s dairy, gluten, or anything else—unless you have a dietitian- or physician-diagnosed intolerance to a certain food, there is no physiological reason to cut it out entirely, says Abby Langer, R.D., a dietitian and nutrition counselor based in Canada. And doing so could risk missing out on vital nutrients such as the calcium and vitamin D in dairy, and heart- and weight-friendly fiber in whole grains. “Plus, when people lose weight by cutting out an entire food group, it’s usually because they’re simply eating less overall,” she says. “Unless you can sustain such an eating style, or any change you make to lose weight, expect the weight to return once you go back to your old habits.”

The Fix: “Consider the individual foods—such as sugary drinks, fried foods, and alcohol—of which you should eat less,” Langer says. (Remember: A healthy diet mentality allows for these foods in moderation!) Where applicable, replace them with whole foods. For example, instead of nixing pasta entirely, sub out refined white pasta for whole-grain varieties.

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Myth #2: You Can Spot Reduce Fat

“It would be great if training your abs would help you lose that extra belly fat, but this just isn’t the case,” says Hannah Davis, C.S.C.S. a Tennessee-based strength coach and trainer. “When you lose fat, you lose it equally from your entire body.” Of course, some of us naturally lose fat in some areas more quickly than in others, but you can’t change your genetic makeup. What’s more, since “spot reduction” exercises like crunches recruit relatively few muscles, they burn minimal calories and have little to no effect on your metabolic rate (your natural calorie-burn rate), which is largely determined by the amount of muscle you have on your frame.

Related: 5 Metabolism Myths—Busted

The Fix: Rather than performing ab exercises because they’ll burn up belly fat (they won’t), focus on building a strong core, which is essential for your overall fitness, Davis says. And, when it comes to promoting overall weight loss, your best bets are large multi-joint exercises that work and build lots of muscles at once. Think: squats, lunges, and burpees.

Sources of omega 3 fatty acids
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Myth #3: Eating Fat Makes You Fat

“Eating too many calories, which could just as easily be from protein or carbs as from fat, is what leads to weight gain,” says Kelly Pritchett, Ph.D., R.D., C.S.S.D., assistant professor of nutrition and exercise science at Central Washington University. Sure, fats do contain more calories per gram (they have nine calories per gram, while carbs and protein have four), so your servings of healthy fats likely need to be a bit smaller than those of carbs or protein. But that’s it. There’s no need to fear eating fats altogether, she says. And, on the flip side, eating too little fat can cause you to overdo it on total calories, since fat keeps you full and satisfied longer. Too little fat can also have negative effects on your heart, brain, and overall health. After all, two polyunsaturated fatty acids that are vital to health, omega-3s and omega-6s, cannot be produced by the body, and can only be obtained through your diet.

The Fix: Get your fat from whole foods like nuts, avocado, salmon, milk, eggs, and grass-fed beef as opposed to fast foods, fried anything, or processed baked goods and pizzas. “Still, whatever the fat source you’re eating, keep your serving sizes in mind,” Pritchett says. Read the food’s label if you’re not sure what a healthy serving looks like. (Think a handful of nuts, a third of an avocado, or a thumb of butter or cheese.)

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Myth #4: Cardio Is The Workout King Of Fat Loss

“This is a huge myth, and especially affects women who have been taught that spending all of their time doing cardio is the key to weight loss and improving body composition,” says Kourtney Thomas, C.S.C.S., C.P.T., a St. Louis-based online and personal trainer. But here’s the thing: Building muscle is critical to optimizing your basal metabolic rate, the number of calories you burn per day by simply living and breathing. While strength training burns calories and builds muscle, copious amounts of cardio can actually burn existing muscle, which is counterproductive to your weight-loss efforts.

The Fix: It’s important to have a well-rounded fitness routine, so don’t cut out cardio altogether—interval-based cardio like sprints can be really great for fat loss—but focus first and foremost on strength. Whether it’s a 30-minute metabolic-style workout (like intervals on a cardio machine or a bodyweight circuit), a powerlifting workout, or an hour-long body part split routine, prioritizing intelligent lifting over 45 minutes on the elliptical will go a long way in helping you achieve a healthy weight, Thomas says.

Related: Find the supplement that fits your weight-management plan.

Whole wheat grains, oats and oat cakes
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Myth #5: You Need To Cut Carbs To Lose Weight

Just because you can lose weight by cutting or reducing carbs doesn’t mean that it’s the only way to do it, or that it’s necessarily healthy. Carbs are your body’s preferred form of fuel, and are vital to optimal brain function and workout performance, says Alexandra Caspero, R.D., a St. Louis-based dietitian. Cutting them often results in lower levels of essential vitamins, minerals, and fiber found in whole food carb sources. “Stick to a moderate carb intake diet, even when you’re trying to lose weight,” she says.

The Fix: Instead of cutting out or drastically reducing your carb intake, focus on swapping out processed carbs like chips, candy, soda, and white grains for whole sources like fruits, vegetables, and whole grains like wheat, quinoa, barley, and oats, Caspero says. This way, any carbs you eat will fuel your body, without spiking your blood sugar and insulin levels, leaving you hungry 30 minutes later, as is common with quicker-digesting refined carbs.

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Myth #6: Fasted Cardio Burns More Fat

“There’s a popular idea that performing cardio while fasted—usually right when you wake up in the morning before eating—burns more fat. This sounds too good to be true because it is,” says Sam Simpson, C.S.C.S., C.P.T., co-owner and vice president of B-Fit Training Studio in Miami. That’s because fasted cardio is synonymous with being under-fueled, meaning it can drastically reduce your capacity to perform high-intensity exercise. (Even if you feel like you are working hard, we’re willing to bet your mile times will be substantially slower.) While you do burn a greater proportion of calories from fat as compared to carbs when you perform low- to moderate-intensity exercise, you burn fewer overall—oftentimes including the number of calories you burn from fat. It can also contribute to losing muscle mass, which is not at all the kind of weight you want to be losing, since less muscle means a slower metabolism.

Fix It: Fuel your workouts! If you like to exercise first thing in the morning, try to get at least a small snack in prior to getting your sweat on. The best pre-workout snacks are rich in both carbs and protein, generally containing about three to four times more carbs than protein, Simpson says. Good examples include a banana and peanut butter, whole wheat toast with jelly, or half of a bagel and one egg.

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Myth #7: You Have To Cut Calories To Lose Weight

If you’ve never heard of the “calories in, calories out” equation for weight loss, it goes like this: The amount of calories you take in must be less than what you expend in order for you to lose weight. “However, this equation is a bit oversimplified, and ignores the fact that the type and quality of the calories you eat also matter,” says Tori Schmitt, M.S., R.D.N., owner of YES! Nutrition. Plus, all calories being equal, suffering from unhealthy lifestyle factors like excess stress and not getting enough sleep can prevent weight loss—and even result in weight gain.

Fix It: Pay attention to more than just calories in versus out. Focus on following a lifestyle that makes you feel healthy—because, in the end, that’s the lifestyle that’s going to be conducive to weight loss, Schmitt says. Prioritize self-care, whether that means going to sleep 30 minutes earlier each night, not taking work home with you every night, or simply moving more throughout the day.

Related: Here’s Exactly What To Do At Night To Have A Great Sleep

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