Throw intense, high-speed intervals into your usual cardio workout, and you’ll burn the same or more total calories in a shorter amount of time—and the harder you push it, the more calories you burn after your workout, Holland says, meaning the fat will melt off to reveal your abs. Peterson recommends adding sprints of 10, 20, and 30 seconds and recovering for two to three times that long. Bonus: You can “sprint” on anything: treadmill, bike, rower, swimming, elliptical—you name it.
Your body can retain water when your sodium and potassium levels are out of whack, Bannan says. In addition to keeping sodium in check, consume potassium-rich foods to maintain the balance and de-puff your belly. Try incorporating 1 medium baked potato without skin (610mg), 1/2 cup white beans (595mg), 1 cup cooked spinach (839mg), 10 dates (466mg), or 1 cup edamame (676mg) daily.

Fennel, peppermint, and ginger have all been shown in research studies to have calming effects on the belly. They work by enhancing digestive enzymes so your food gets moved through your system faster. And faster-moving food means a flatter tummy. In addition, peppermint reduces cramping and gas, ginger helps with nausea and inflammation, and fennel is a diuretic to help you stop retaining water. Here are other home remedies to help an upset stomach.
To start off your quest for a flat belly this summer, why not begin with a simple and versatile exercise you can do whenever you have a spare 5 minutes? Flat planks engage your core, and according to Eat This, Not That! For Abs author Mark Langowski, they are “the single most effective move that works every muscle in your body.” Whether you’re doing some flat planks while you watch TV at night or in your office during some downtime, they will have your abs (and the rest of you) looking fit and toned in no time. “If you can only do it for 30 seconds before collapsing, try to add 10 seconds to it each time you attempt it,” Mark advises. “Do this for three sets every other day and you’ll start seeing results!”
Lie faceup with legs together and extended straight out. Rotate hips slightly to left so that legs are on a left diagonal. Place left hand lightly on back of head and extend right arm straight out to side, palm facedown (A). Crunch up and lift legs, keeping legs on the diagonal (B). Slowly lower back to floor. Do 30 to 40 reps; repeat on other side.

Stress skyrockets your levels of cortisol, often called “the belly fat” hormone because it signals to the body to store fat around your waist. Add the daily stressors of living our modern lifestyle and you can see how cortisol can be constantly coursing through your veins. This perma-stress mode isn’t good for a lot of healthy reasons, your tummy being just one of them, so it’s important to take time every day to de-stress. Yoga, meditation, walking, journaling, doing a hands-on hobby, or playing a musical instrument are all great time-tested methods. (Hint: Know what isn’t? Watching television. The boob tube actually increases your levels of cortisol!)
Whereas many beverages can increase your waistline (see above), there is one that is guaranteed to trim your tummy: water. Drinking plain ol' H2O works because staying fully hydrated tells your body it's okay to release any extra water it's retaining, decreasing the accompanying bloat. Plus, drinking water has been proven to reduce cravings for sweets, lower your appetite, and help you feel satiated faster.
Try the Spiderman Climber: Get into plank position with arms and legs extended, hands beneath shoulders, and feet flexed. Keeping your abs tight, bend your left leg out to the side and bring the knee toward the left elbow. Pause, then return to start. Switch sides. Do 20 reps, alternating sides, with 30 minutes of cardio 5 to 6 times a week. For an additional challenge, perform planks with forearms on the floor, as shown. (Watch this video to make sure you're neailing the proper form every time.)
"When you're frazzled, your body increases its production of steroids and stress hormones, which negatively affect your digestive system, causing major constipation," says Dr. Reichman. And as if that weren't enough to leave you looking pouchy, stress also amps up the production of cortisol, a "fight or flight" hormone that sends excess fat directly to your midsection in its attempt to protect your vital organs. To minimize tension, Dr. Reichman advises taking 20 minutes a day to relax.
Flat-Belly Bonus: Fiber-rich lentils feed healthy gut bacteria and keep things moving along smoothly in your gut to prevent bloating and constipation. And adding dark leafy greens (as we do in tonight's dinner) helps you take in fewer calories without increasing hunger. As per Harvard University research, vegetables are the number one food that promotes weight loss.

The thyroid gland is best known for its metabolic function affecting weight. Estrogen dominance renders the thyroid hormones dysfunctional, causing your body's metabolism to slow down. The resulting condition is called relative hypothyroidism. In addition, the changes in your body's blood sugar levels—some of which occur naturally with age and some of which are due to a hormone imbalance—are also linked to weight gain. As the body's progesterone production decreases with age and estrogen becomes dominant, your body releases insulin more rapidly and more often. When fluctuating hormones unnaturally stimulate insulin release, you get hungry faster and will often crave sugar. In fact, these food cravings can sometimes be uncontrollable, and people who are estrogen dominant tend to consume more sweets even when they aren't truly hungry. As a result, they ingest more calories than their bodies require and pack on even more pounds.

Lie on your right side with your knees straight. Place your right hand under your right shoulder. Lift your hips off the floor until your body forms a straight line from your ankles to your shoulders. Flex your feet and extend your left arm up to the ceiling. Breath deeply for the duration of the exercise. Hold this position for up to 60 seconds. Lower and repeat on the other side.
Dinner: Turkey Burgers. Looking to mix it up from traditional burgers? Try these tasty and healthy turkey burgers. Use thick slices of tomato or large leaves of lettuce in lieu of bun. Top with leftover avocado from breakfast and serve with a side of oven baked sweet potato fries. Sweet Potato Fries Recipe: http://www.eatingwell.com/recipes_menus/recipe_slideshows/healthy_turkey_burger_recipes

The book itself doesn't get tediously microbiome-focused, though. The first section of The Lose Your Belly Diet sets the stage, then part two goes into which foods can give you that healthy mix of gut bacteria. Part three focuses on other ways to boost your stomach's microbiome health (avoiding antibiotics when you don't need them, exercise, and what probiotic supplements to take, namely), while part four gets actionable, providing a diet quiz, recipes, and a meal plan.
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