You see, when you eat food, your body’s insulin levels rise, and it begins breaking down, absorbing, and using and storing the nutrients you’ve just fed it. This is known as the “postprandial” (prandial means “having to do with a meal”) or “fed” state, and it can last anywhere from two to six or more hours, depending on how much and what types of food you eat in a meal.
Try interval training. Interval training is where you do really intense activity for only a short period of time, and then moderate or light intensity work for the majority of the time. Scientists have found, in several studies, that people who do interval training actually end up exercising for shorter periods of time and burning more calories than people who go at medium intensity for their whole workout.
All meals are important, but breakfast is what helps you start your day on the right track. The best, heartiest breakfasts are ones that will fill you up, keep you satisfied, and stave off cravings later in the day. Aim to eat anywhere between 400 and 500 calories for your morning meal, and make sure you're including a source of lean protein plus filling fat (e.g., eggs, beans, unsweetened Greek yogurt, nuts, or nut butters) and fiber (veggies, fruit, or 100% whole grains). Starting your day with a blood sugar-stabilizing blend of nutrients will help you slim down without sacrifice.
“The one trick I use now, which I should have been using all along, is the make dinner a no-carb meal. I’ll do a vegan protein and vegetables, and no bread. I think carbs are important and good energy, but when I don’t eat them at night, I wake up and I feel like my belly’s flat first thing in the morning.” — Carrie Underwood, who lost 30 pounds of baby weight in less than a year
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.