To do it: Start in a plank position with one small towel placed under each ball of your foot, legs together. Bring your left knee in towards the right side of your chest, squeezing your abs. Then, straighten your right leg back out to full plank and bring your right knee in towards the left side of the your chest and back out to full plank. Next, draw both knees into your chest at the same time and then slide your legs back out to full plank. That’s one rep. Build up to 3 sets of 12-15 reps (resting in between).
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."
For building muscle; follow a simple training routine that focuses on compound movements. Compound movements for weightlifting are deadlift, squat, and presses. For bodyweight training, they are burpees, push-ups, bodyweight squats, and pull-ups. These exercises are enough to train 80% of the muscles in your body. Add a few supporting exercises for the remaining muscles and you have all the exercises you need to build a great physique.
Exercise also can't erase a couple factors beyond your control, experts say. "I think age plays a critical role in how easy or hard it is to get 'six-pack abs.' It's all about hormones – when we are younger, we have more circulating androgen hormones, which affords us the ability to not eat clean and yet continue to be shredded," Chait says. Our androgen hormone levels decline after we reach age 27, he says. (Testosterone is an androgen hormone in men. In women, a primary purpose of androgens is to be converted into female hormones known as estrogen.) After that age, "we need to focus more on dietary adjustments to maintain a lean body," Chait says.
Eat similar meals every day. "I pretty much eat the same thing, or substitutions that are very close to my normal meal plan, every day," Yobe says of her daily food intake, which includes a protein bar before her morning workout, a protein shake afterward, and two meals including chicken or fish, veggies like a green salad or bok choy, and a carb like rice, pasta, or potatoes. She also snacks on rice cakes with peanut butter, carrots, celery, and nuts. Although she admits this can be boring, the approach makes it easier for her to get all the nutrients she needs while remaining satisfied throughout the day.
But instead of just trying to perform as many reps as possible, slow down and really focus on the quality of the movement—especially the eccentric, or downward motion, of the exercise, he says. “The eccentric contraction is the most important phase when sculpting any muscle.” Plus, focusing on quality over quantity will help protect your back (some experts say crunches can be potentially troublesome for guys with back issues.)