The math is simple: keeping your calories down is a surefire way to keep your weight down. But make sure you don’t dip too low. Eating too little can slow down your metabolism, which can have adverse effects on your body. “It doesn’t know when the next meal is,” says Shapiro. Put another way: when it comes time for your body to burn off calories, it may hold on to them instead. Think of your body like a furnace. It constantly needs fuel intake to continue burning.
Trainer tip: You know planks, right? It’s easy to go through the motions here. Don’t do it. “The key is to squeeze your entire body—quads, glutes, core, back, and fists—as tight as possible while taking diaphoretic breathes throughout the hold,” says Wealth. No matter how many times you’ve done it, this exercise is as difficult as you’re willing to make it.
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."