Make fish a regular part of your weekly meal rotation. The Harvard Medical School suggests replacing your saturated fat foods -- steak and bacon -- with more polyunsaturated fats -- salmon and tuna -- to help reduce belly fat. Plus, these healthy fats lower risk of heart disease, which is more prevalent in men than women. A healthy dinner for a flatter belly might include 4 ounces of broiled tuna with 2 cups of roasted Brussels sprouts and 1/2 cup of brown rice for 540 calories.
Yep, you read that right. High-water foods like fruits and veggies will fill you up faster, says Jaclyn London, M.S., R.D., C.D.N, Nutrition Director at the Good Housekeeping Institute. Start your meal with soup, salad, or her favorite pick: Pre-dinner sliced crudité and spicy hummus. The combo of capsaicin (a spice in hot peppers) and the chickpeas' soluble fiber can help curb hunger.
Dark chocolate is packed with MUFAs—or monounsaturated fatty acids—that help your body burn belly fat. Dark chocolate is also filled with flavonoid antioxidants (more than 3 times the amount in milk chocolate) that keep blood platelets from sticking together and may even unclog your arteries. It may also help with weight loss by keeping you feeling full, according to a study from Denmark. Try a chocolate with 70% or more cocoa. Get your fix in these 10 Guilt-Free Chocolate Desserts.

Exposure to light at night doesn’t just interrupt your chances of a great night’s sleep, it may result in weight gain, according to a study in the American Journal of Epidemiology. Study subjects who slept in the darkest rooms were 21 percent less likely to be obese than those sleeping in the lightest rooms. For more ways to lose weight, check out these 33 Ways to Flatten Your Belly—Fast!!
If you want a flat belly in a matter of days, you better be ready to work for it and feel the burn. That’s where the killer combo of flutter kicks and crisscrosses comes in. According to Mark, this exercise “practically draws the lines right down the sides of your midsection as you are doing them.” In addition to engaging your abs, the motion of your legs required by this exercise also works your inner and outer thighs. If you’re looking to wear short shorts and bathing suits this summer, this routine is for you!
Crunches work the upper abdomen, leg raises work the lower abdomen, and side bends work the obliques (also known as love handles). About 15-25 reps each day should be enough. If you can do more than that, try adding weights to your routine. Note that doing crunches will only build muscle underneath your existing belly fat, but will not burn that fat directly.
Your phone, tablet, and television may be affecting your waist size in more ways that one. Obviously if you're sitting on electronics then you're not moving around and burning calories. But the effects go beyond just energy. Blue light from electronic screens can disrupt your circadian rhythms; so our addiction to electronics is reducing our sleep as people favor Netflix-bingeing to bed. Both of these effects have been linked to higher levels of belly fat.
Core compressions: Sit tall in a chair with your feet hip-width apart and your belly flattened toward your spine. Place one hand on your upper abs and the other on your lower. Take a deep breath in, then exhale forcefully to draw your abdominal muscles in even tighter, keeping your back straight and still. Continue for five minutes, focusing on slow, complete tightening of the muscles. Do two sets.
Speaking of fiber, another great source of the satiating nutrient is hummus and vegetables. Dippable veggies such as carrots, bell peppers, and broccoli are packed with fiber and an array of other vitamins, and they pair perfectly with the creamy chickpea dip, which has 2.5 grams of fiber per ¼ cup. By skipping unhealthy cheesy dips in favor or hummus, you’ll be doing your belly (and the rest of your body) a massive favor.

Peterson is a fan of Chaturanga Dandasana—a.k.a. yoga pushup—for the extension and isometric contraction it provides: From plank, bend your elbows and begin lowering toward the floor, with every part of your body an equal distance from the floor. Keep your elbows close to your body, abs engaged (not clenched), back straight, thigh muscles active, and glutes soft. Start by holding the pose above the floor for 5 full, complete breaths, and work up to 10. Push back up to plank in 4 counts. Do 4 reps every other day.
It's not just about weight loss. Having great gut health is linked to good health throughout your body. Scientists in this rapidly growing field are finding connections between gut microbes and the   ;immune system, weight loss, gastrointestinal health, allergies, asthma, and even cancer. With every study that's published, scientists become more convinced that having a healthy gut leads to having a healthy body.
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