Follow a program. Alcantara is all about consistency — one reason why she recommends choosing a structured fitness plan rather than shooting in the dark and praying you surface with abs. "Follow it to 100 percent, do it back-to-back," she says. Many fitfluencers offer their own programs, but you'll want one from a certified fitness trainer like Alcantara, who offers an eight-week guide.

"One of the main jobs of the abdominal or core muscles is to act as stabilizers for the trunk, helping to support while the person is squatting, lifting, or moving about in general. Many studies show that muscle fiber activation rates in the rectus abdominis, transverse abdominis, and internal and external obliques are higher during the squat than during many ‘traditional’ crunch type exercises where the performer is lying on their back."
To do it: Lie down with a small ball (a small pillow will also work if you don’t have a ball) under your heels, both arms extended over your head, palms facing towards each other. Inhale to prepare as you lift your head, neck, and shoulders off the floor and then exhale as you continue to roll up by drawing in your abdominals, reaching up and over towards the feet. Keep your abdominals contracted, with your spine rounded in a ‘C’ curve, and then inhale to prepare and exhale as you roll down through each vertebra in a controlled movement, keeping your heels pressed evenly into the ball the entire way up and down. Do 15 reps as controlled and precise as you can.
Genetics is another unchangeable factor that affects your ability to develop a six-pack, says Holly Herrington, a registered dietitian at Northwestern Memorial Hospital's Digestive Health Center in Chicago. "We get things from our families," including our musculature and build, Herrington says. The offspring of volleyball star Gabrielle Reece, who is 6 feet, 3 inches tall and muscularly lean, with well-defined abs, will almost certainly have a different build than someone who is short and stocky, for example. "It doesn't mean you can't strive [for defined abs], but some of it is genetic," Herrington says.
Abdominal muscles consist of three layers. The very deepest layer is the transversus abdominis, which acts as the body's girdle, providing support and stability and plays a critical role in exhalation. Next is the rectus abdominis, which flexes the spine. Closest to the surface are the internal and external obliques, which turn the trunk and provide the body with rotation and lateral movement.
Do it: With your feet shoulder-width apart, lift a barbell off the rig, centering it evenly across your shoulders. (This version of the squat targets the core, not the legs, and so you should be using far less weight than you would for a traditional back squat.) Send your glutes back like you’re lowering into a chair, bending at the knees as deeply as possible. Press through your heels to return to the starting position for one rep. Do 12 reps for one set.
That's why Jack recommends doing 360 abs to sculpt a washboard stomach and improve core stability all at once. While in a pushup position, you must keep your torso completely still as your legs create sweeping circles in different directions. Doing smaller loops hit your six-pack muscles, while bigger ones hit your entire midsection including your obliques, hips, and lower back.
Some experts recommend eating six small meals a day, instead of the more conventional three, cutting out added sugars and processed foods, and loading up on dependable sources of protein to help build new muscle in your midsection. Before you commit to any new diet, though, speak to your doctor and/or a nutritionist to see what they believe will work best for you.
Let’s take push-ups for example. The maximum number of push-ups you can do in a training session will increase quickly from, say, 20 to 30, 30 to 50, 50 to 100 in a matter of weeks. What will you do next to achieve progressive overload? You can’t increase your reps of push-ups forever. Who wants to do 300, 400, or 500 pushups in a single training session? That would take too much time. Luckily, you don’t have to do that. Once you hit a reasonably high number of reps, you will stop adding reps and start shortening the time it takes to complete those reps.

Bent-Elbow Plank: This exercise works the whole trunk, particularly the transversus abdominis. Start by lying on your belly and then lift yourself up onto your toes and forearms (elbows in line with shoulders) while contracting your abdominals and keeping your back neutral. Hold that position for five seconds, then rest and repeat. Ultimately, strive to hold the pose for 90 seconds without any rest -- for one set. If you're more experienced, you can also do this exercise on your hands and toes. (As a beginner, start on your hands and knees with a neutral spine and simply contract the abdominals on an exhale without moving your back.)
I have about 2 treat meals a week. ‘Treat’ sounds better than ‘cheat’ because after all, you’ve earned it! This is when I occasionally indulge in some beer, a slice of pizza, creamy pasta, something fried or maybe ice-cream. I’m a huge fan of Middle-Eastern cuisine so one of my meals over a weekend would definitely be a shawarma, a hummus platter and some kebabs on the side. I have a diet coke sometimes but mostly avoid all other soft-drinks including fruit juice (too much sugar, even the ‘natural’ variants). It’s imperative you make a conscious attempt to stay away from all of this on regular days.
To do it: Stand with your feet planted 3-4 feet apart, toes slightly turned out, hands on your hips. Lower into a plie by bending your knees out over your toes and lowering your hips directly underneath your shoulders. Then, as your straighten back up, slowly lift the right knee up towards the right shoulder. As you go back into the plie, slowly return the foot to the floor. Be sure to move at a very controlled pace to really engage the obliques the entire time—on the way up and on the way down. Do 10 repetitions on the right side, then another 10 repetitions on the left side for a total of 20.

best ways to build core

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