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!
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%.
4. Be sure to eat enough protein. As you lower your calorie intake and cut down on processed foods and refined sugar, be sure to get enough protein, Singer says. "Prioritizing protein will help you maintain muscle mass," he says. Lean meats, skinless chicken and turkey, beans and lentils, tofu and soy-based foods, eggs, nuts and low-fat dairy products are good sources of protein. Your body breaks down protein into amino acids, which it uses to build muscle, according to Harvard Health. Research published in 2015 in The American Journal of Clinical Nutrition suggests that for all adults, consuming high-quality protein (from eggs, beef and dairy products, for instance) in combination with physical activity "represents a promising strategy to delay the onset of sarcopenia [a disease characterized by loss of muscle mass and strength]."
This athletic move takes the plank to an all-new level. "It not only improves your core stability, but it targets muscles in your hips, groin, lower back, and often-neglected lower abs," says Durkin. Get your heart pumping by speeding up the movement, or hammer your core muscles by slowing it down. Either way, the exercise will boost your athleticism and will give you something to bare at the beach.

Better news: By doing the types of routines here that strengthen from all angles and focus on function (how your body moves in real life) rather than flexion (crunches), you’ll look good and have a stronger core and less risk of lower back injury. “Not only will you see better gains faster, it’s also the quickest way to take inches off your waistline,” says Fitzgerald.
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."

ripped 6 pack abs