6. Fast once a week: While regularly underfeeding your body completely messes with your hormone balance, there’s sufficient research to suggest that intermittent fasting (IF)—or going without any food for set intervals—can actually help your insulin sensitivity and burn more fat. Researchers at LSU, for example, found that when people fasted all day, every other day, their fat oxidation increased and they actually lost 4 percent of their body fat in just 22 days. There are a lot of ways to go about IF, from fasting for 12 to 16 hours every day, to going 24 hours once a week. (Learn more about it here.)
Do more HIIT: High intensity interval training (HIIT) is as close to a magic pill as we have (except it involves a whole lot more work than just swallowing a capsule—sorry). Not only does it surge your body to max intensity during the workout, but because you’re working so hard, your body can’t deliver enough oxygen in the moment, explains personal trainer Jeremey DuVall. Your muscles accumulate a “debt” of oxygen that then has to be repaid post-workout. This throws your body into a phase of fat burning for hours after you’re done sweating, known as post-exercise oxygen consumption, or EPOC. Plus, super intense circuits like this activate muscle-building hormones like growth hormone and IGF-1, he adds.

Drinking whey protein as a between-meals snack is a smart way to enhance not only muscle growth but also fat loss. UK researchers found that when subjects consumed a whey protein shake 90 minutes before eating a buffet-style meal, they ate significantly less food than when they consumed a casein shake beforehand. The scientists reported that this was due to whey’s ability to boost levels of the hunger-blunting hormones cholecystokinin and glucagon-like peptide-1.
Work your core. When many people think of core strengthening, they think of stomach crunches. Crunches are helpful for building abdominal muscles, but contrary to popular belief, crunches won't do much to lose the layer of fat stored in your belly, and can actually cause significant damage to the spine.[34] Instead, try a workout routine that strengthens your whole core, like yoga, or try abdominal presses and planking.[35]
Getting your Om on won’t burn as many calories as a hilly run or lifting weights, but it can help build muscle and improve your endurance, which are all crucial for boosting your metabolism. Some of the highest calorie-blasting yoga poses include plank, chair, Chaturanga, and wheel. New to yoga and aren't sure where to start? Learn more about the different types of yoga to help you find the best practice that fits your workout goals.
Try this 4-minute rowing circuit: Begin with 20 seconds of rowing followed by 10 seconds of rest. Look at how many meters you traveled in that time. (Don't get off the rowing machine or even let go of the handle when you rest, says Penfold.) Repeat this eight times, trying to beat your distance each time. When you're finished with this four-minute circuit, row a fast 500 meters and note how long it takes you. "That's the number you'll want to match or beat during your next rowing session," says Penfold.
5. Hydroxycitric Acid (HCA): The name sounds scary, but this supplement is derived from a salt in a Southeast Asian fruit plant. And the perks are real: HCA can help decrease the amount of visceral, subcutaneous, and total fat on your body, according to a study in the Journal of Obesity. It works by suppressing your appetite, reducing the amount of fat your body absorbs from your diet, and increasing your metabolism. 

Pushing through the foot on the floor, punch the kettlebell up with the loaded arm and roll onto your free forearm. Don't shrug your shoulder toward your ear with the supporting side. Be sure to keep your chest wide open. Straighten the elbow on the ground and lift yourself up to a seated position. Weave your front leg through to the back. To protect your knees, your shin on the back leg should be perpendicular to your shin on the front leg.


Work your core. When many people think of core strengthening, they think of stomach crunches. Crunches are helpful for building abdominal muscles, but contrary to popular belief, crunches won't do much to lose the layer of fat stored in your belly, and can actually cause significant damage to the spine.[34] Instead, try a workout routine that strengthens your whole core, like yoga, or try abdominal presses and planking.[35]
Eat more fat: The idea that eating fat makes you fat has been dethroned hard in recent years. And in fact, dietary fat can help you burn more off your body—as long as you’re eating the right kinds. Healthy polyunsaturated or monounsaturated fats—like salmon, trout, avocado, sunflower oils, olive oil, and nuts—can decrease appetite, improve heart health, and stabilize glucose levels which can help trim body fat, Montenegro explains.
Vary your daily calories while reducing your overall average. Your body may adjust to a lower but steady calorie intake, meaning it won't draw from your stored fat. To keep your body guessing and your metabolism up, try switching between higher and lower daily calorie intakes. This might help avoid that dreaded weight-loss plateau and improve your willpower.[2]
How to do overhead medicine ball slams: Standing tall with your feet hip-width apart, hold a medicine ball with both hands. Reach both arms overhead, fully extending your body. Slam the ball forward and down toward the ground. Extend your arms toward the ground as you slam and don’t be afraid to bend your knees as you hinge over. Squat to pick the ball up and then stand back up.
How to do Russian twists: Sit up tall on the floor with your knees bent and feet off the ground. Hold a medicine ball with your hands at chest height. Lean backward with a long, tall spine, holding your torso at a 45-degree angle and keeping your arms a few inches away from your chest. From here, turn your torso to the right, pause and squeeze your right oblique muscles, then turn your torso to the left and pause to squeeze your left oblique muscles. The movement should come from your ribs and not your arms.

Exercising at lower intensities will use more fat for energy. This basic premise is what started the theory of the fat burning zone, which is the idea that working in a certain heart rate zone (around 55 to 65 percent of your maximum heart rate) will allow your body to burn more fat. Over the years, this theory has become so ingrained in our exercise experience that we see it touted in books, charts, websites, magazines, and even on cardio machines at the gym.

Ansari says alcohol can prevent weight-loss in several ways, including the fact that heavy alcohol intake can stimulate food intake. "Binge drinking can overload the liver. The liver then prioritizes processing alcohol over other nutrients and then stores the protein, carbs, and fat as fat in the body," Ansari explains. The Centers for Disease Control and Prevention (CDC) defines binge drinking as having five or more drinks for men, and four or more drinks for women in two hours. "Also, alcoholic beverages are often mixed with sugar-rich beverages. Drinking more than moderate amounts of alcohol can cause calories to add up quickly."
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