1. Consume fewer calories than you're burning every day. Job one when trying to achieve a six-pack is to lose weight, which means expending more calories than you take in on a daily basis, says Dani Singer, a certified fitness nutrition specialist and certified personal trainer in Baltimore. He's the director of Fit2Go Personal Training. To optimize losing fat and not muscle, you need to be in a caloric deficit, eat adequate protein and strength train, he says. "The source of your food will affect health, but will have zero effect on your body composition," Singer says. "It's the total calories and macronutrients [protein, fat and carbs] from your foods that will determine how your body looks."
Many people ask themselves how lean should they be. The ideal body fat percentage varies based on gender and on how active you are. For instance, the average body fat for a woman is between 25-31%, while for a man it is between 18-24%. On the other hand, the ideal body fat percentage for a woman who works out is between 24-21%, while for men it should be between 14-17%. To get a clearly defined six pack, a man needs to get to under 10%.
Building muscle and burning fat at the same time is the holy grail of bodybuilding but many people believe that it’s impossible. Here’s how it goes. Experienced bodybuilders first bulk then cut. Bulking is the period where they eat more calories than they burn (caloric surplus) in order to pack on muscle mass. Cutting is the period where they eat fewer calories than they burn (caloric deficit) in order to burn off the fat they inevitably gained during the bulk. The remaining muscle after bulking and cutting is their lean muscle gain.
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."