Before you launch into the advanced ab workout, you will want to ease into it with some basic core exercises to warm up the abdominal muscles. The Plank is a great way to begin. The plank provides a simple and effective core warm-up because engages all the muscles of the core from your toes up to your head. Holding the plank requires the activation of all the major ab muscles as well as many stabilizer muscles that are often ignored.

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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