If you want to lose weight you should start by avoiding sugar and starch (like bread, pasta and potatoes). This is an old idea: For 150 years or more there have been a huge number of weight-loss diets based on eating fewer carbs. What’s new is that dozens of modern scientific studies have proven that, yes, low carb is the most effective way to lose weight.
Don’t let extra hours lounging in bed stand between you and a flatter belly. While getting enough sleep can help boost your metabolic rate, sleeping in may undo any benefit you’d enjoy from catching a few extra winks. One study reveals that late sleepers who snoozed past 10:45 in the morning ate nearly 250 more calories over the course of the day, despite eating half as many fruits and vegetables as their early bird counterparts. Even worse, they chowed down on more salty, sugary, and trans fat-laden fast food than those who woke up earlier. If you happen to head out of the house early, you’re in for an additional metabolic boost; researchers at Northwestern University have found that people exposed to just a short period of early morning sunlight had lower BMIs than their late-waking counterparts.
This easy a.m. ritual works on two levels. First, a recent study found that exposure to sunlight in between the hours of 8 am and noon reduced your risk of weight gain regardless of activity level, caloric intake, or age. Researchers speculate that the morning light synchronizes your metabolism and undercuts your fat genes. And burning calories before you eat means you’re exercising in a fasted state—the energy you burn comes right from your fat stores, instead of the food you ate. But what really stunned Martha was the improvement in her heart health. Before starting Zero Belly Diet, Martha’s heart rate would typically soar to 112 beats per minute (bpm) within moments of starting her exercise bike workout. “After the first week and a half I could not raise my heart rate over 96 bpm with the same workout. It was great to see change in the mirror, and even better to know good things were happening that I couldn’t even see.”
Brock’s credentials include: Certified AFLCA Group Fitness Leader with a designation in Portable Equipment, NCCP and CAC Triathlon Coach, Team in Training certified run coach (trained by Dr. Jack "Tupper” Daniels). He is a member of the Superhuman Coach network, on the advisory board of the Primal Health Coach training, and is an instructor for the Bulletproof Training Institute. Brock is also a former professional ballet dancer and has coached well over 250 people across the finish line through Skywalker Fitness, TrainingPeaks, Greenfield Fitness Systems and Team in Training.
The researchers hypothesize that participants who abstained from animal products dropped significantly more pounds since plant-based foods include loads of filling fiber and slow-to-digest complex carbs. Though more research is needed to confirm these results, the study authors write, "Vegetarian diets appeared to have significant benefits on weight reduction compared to non-vegetarian diets."
Skimp on fluids, and your body will release an antidiuretic hormone that leads to water retention that could affect the scale, Dr. Setlzer says. While this sneaky effect is one reason why the scale is a poor measure of body mass loss, you can outsmart it by drinking more—particularly if you fill your glass with water or non-calorie alternatives like unsweetened coffee and tea.
High blood sugar levels coupled with high blood ketones, on the other hand, will mean that you have a pathologically low level of insulin – something non-diabetics do not suffer from. This can lead to ketoacidosis – a potentially life-threatening condition. If this happens, you’ll need to inject more insulin; if you’re at all unsure of what to do, contact a medical professional. Coveting really high blood ketones for weight control is not worth the risk for type 1 diabetics.
In other words? "Drinking makes you more likely to eat sh*t," Dr. Seltzer says, referring to drunk foods. At the same time, he stops short of asking patients to quit alcohol cold-turkey to lose weight. Plus, research suggests you don’t have to, as long as your intake is moderate—i.e., less than about a drink a day. "If you drink a glass of wine every night and notice you eat more afterward, eat less early to account for this," he says. "Or, if you’re drinking four glasses of wine a week, drink three instead so you’ll won’t feel such a big difference."

A diet that’s low in fat and carbohydrates can improve artery function, according to a 2012 study by Johns Hopkins researchers. After six months, those on the low-carb diet had lost more weight, and at a faster pace. But in both groups, when weight was lost—and especially when belly fat shrank—the arteries were able to expand better, allowing blood to travel more freely. The study shows that you don’t have to cut out all dietary fat to shrink belly fat. For heart health, simply losing weight and exercising seems to be key. 
Why it works: Burpees are a full-body workout that don’t require any equipment. You’re targeting multiple muscles as you work, which increases your overall energy expenditure. Plus, capping your workout with a HIIT sprint session will help you reap the benefits of an aerobic workout without having to go on a distance run. Ain’t nobody got time for that.
Certain carbohydrates have a tendency to be poorly absorbed in your intestines and then rapidly fermented, leading to gas and bloating. Common culprits include refined carbohydrates and simple sugars—like those found in processed foods with added sugars. Excess sodium can also cause bloating due to increased water retention. Opt for freshly prepared foods and reduce processed, packaged foods to cut back on belly bloaters. In the morning, swap your sugar-laden bowl of cereal for this Green Smoothie, made with fresh fruits and vegetables to get your day started the right way.

A daily run or Spin class is great for your heart, but cardio workouts alone won't do much for your waist. "You need to do a combination of weights and cardiovascular training," says Sangeeta Kashyap, MD, an endocrinologist at Cleveland Clinic. Strength training increases muscle mass, which sets your body up to burn more fat. "Muscle burns more calories than fat, and therefore you naturally burn more calories throughout the day by having more muscle," says Kate Patton, a registered dietitian at Cleveland Clinic. Patton recommends 250 minutes of moderate-intensity exercise or 125 minutes of high-intensity exercise a week.


We’ve now arrived at tip number 16. If you’re still having trouble losing weight, despite following the 15 pieces of advice listed above, it might be a good idea to bring out the heavy artillery: optimal ketosis. Many people stalling at weight plateaus while on a low-carb diet have found optimal ketosis helpful. It’s what can melt the fat off once again.
About 65 percent of the human body is made up of water, so it's important to replenish the water you lose each day. According to a study conducted among 10,000 adults aged 18 to 64 over a three year period, drinking plenty of water and eating water-filled fruits and vegetables significantly improves your ability to lose weight fast, especially if you are overweight or obese.
Doing crunches until the cows come home? Stop it! When you're down to your final inches of belly fat, the dreaded crunch won't be the exercise that finally reveals your six-pack. "You can't spot reduce," Jill says. Instead, she suggests doing functional exercises that use the muscles in your core—abdominals, back, pelvic, obliques—as well as other body parts. "These exercises use more muscles, so there is a higher rate of calorie burn while you are doing them," she says. Planks are her favorite functional exercise—they activate not just your core muscles but also your arm, leg, and butt muscles.
If your fitness goals include a flatter belly and stronger core, you're going to need a solid plan, expert guidance, and a little outside motivation. Our 30 Days to a Flat Belly plan has all three! This comprehensive workout plan will give you results you want without a pricey gym membership; you can do these workouts anywhere — and they're all 30 minutes or less.
While many people turn to artificial sweeteners in a misguided attempt to whittle their waistlines, those fake sugars are likely to have the opposite effect. According to researchers at Yale, artificial sweeteners are actually linked with an increased risk of abdominal obesity and weight gain, possibly because they can trigger cravings for the real stuff and spike insulin levels in a similar fashion to real sugar.

Science backs these ideas up when it comes shedding belly fat: In one study published in The Journal of Nutrition, researchers had overweight men and women follow a high-protein diet (30 percent protein, 40 percent carbs, and 30 percent fat) or a high-carb diet (15 percent protein, 55 percent carbs, and 30 percent fat). After one year of weight loss and maintenance, they found that the high-protein group experienced a 21 percent greater weight loss and 27 percent greater body fat loss on average than the high-carb group.
"The focus is to properly build your glutes and hamstrings, as this will enhance your shape on a physiological level and keep you burning fat on a metabolic level," he said. Although we like the idea of how booty gains look on our figures, it's about so much more than how voluptuous your butt gets. Your glutes are the biggest and strongest muscles in the body, so if you train them properly with weightlifting, you'll maximize your fat-burning abilities and get fitter much faster.
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