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.
Intermittent Fasting(IF) — Basically, skip breakfast and have only water/black coffee till lunch. In IF, you don’t eat for a period of 16 hours, typically skipping one major meal. You avoid spiking your insulin levels, your HGH is elevated and allow your body to tap into fat for energy. It also allows you to have a larger lunch and dinner, keeping you full longer for the rest of the day. IF is also shown to have various health benefits and is completely safe. Fun fact, even Terry Crews from the TV show ‘Brooklyn nine nine’ follows IF to stay ripped at 49. I followed IF for the first 3 months when I worked out in the evening. I also skip breakfast on treat days so I can eat a whole lot of food that evening!
And, since the muscle is designed to bring your lower ribs and pelvis closer together or farther apart, you need to work them that way—with crunches and reverse crunches, Cary says. In fact, research commissioned by the American Council on Exercise shows that the crunch works the rectus abdominis better than other common abs exercises including the plank, sit-up, and boat pose.
To do it: Start with feet in a wide stance, knees bent, arms up on guard. Keeping your lower body still, quickly lean your upper body to the right, then come back through the center and lean to the left. Repeat lean back to the right. Next, lower your upper body, from the right around to the left side, making a half circle with your torso. Return to start position. That’s one rep. (Tip: it helps to keep a steady rhythm with this move, think—or say aloud—1, 2, 3, weave to help you keep your tempo). Repeat 10 times total, alternating starting on the right and left sides.
Alcohol also hurts you in two other areas: “It is a diuretic, which dehydrates you and reduces energy levels,” he says. “It also can decrease testosterone in our bodies which is critical for creating muscle.” Next time you’re planning guys’ night, stick to one or two light beers or a hard liquor with a diet soda mixer. After that, opt for club soda with a lime—nobody but the bartender will know. 

Instead, we've put together a full slate of top-level choices in no particular order, along with some explanation about what make each one great and the research backing them up, when available. When building this list, we considered bodyweight and loaded exercises, EMG studies, anti-rotation movements, and much more so that no ab exercise was left behind. That said, it's time to meet the crème de la crème of the core!

"My goals six years ago was to 'get abs' and I used to think cardio and crunches would get me there. But it wasn’t until I started lifting weights and varying my abdominal exercises that I started to see a major change. You don’t realize how much you use your core muscles in order to perform powerful rapid movements like deadlifts!" — Shante Franca, @shantefranca