3. Beware of smoothies. Many of Hagensick's clients tell her they have a smoothie for breakfast. A typical smoothie could consist of a banana, a cup of spinach, one or two cups of mixed frozen berries and milk. Hagensick says she tells her clients to think about how many calories such ingredients total. "A half cup of frozen mixed berries is one serving of fruit. A small banana is a serving. You could have four or five servings of fruit, and each serving will have about 60 to 80 calories. That adds up," she says. "When you add a cup of low-fat plain yogurt, that's 100 calories. A smoothie could easily total more than 400 calories and you can consume it in a matter of minutes. If that's all you're having, you might end up hungry a couple hours later due to the spike in blood sugar from an overload of carbohydrates, and you could end up eating more over time than if you just had a good breakfast."
Thankfully, if you’re already reasonably fit, just a few tweaks to your routine here, a few modifications to your diet there, and you’ll be well on your way to shredded stomach glory. To that end, we’ve gathered up the best tips and tricks—expert-approved advice to ensure that, in no time, you’ll have the sculpted abs of your dreams. And for some core-specific moves, check out The Best Workouts For Getting That Summer Six-Pack.

Eat carbs. "There's this notion that carbs are bad and that you need crazy amounts of protein to be lean and fit," says Alcantara, who disagrees, and eats just as much carbs as protein, although the ideal ratio varies based on your goals. "Whatever you eat to get the results you want has to be sustainable, otherwise you're going to end up right back where you started with the same habits that got you there."

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