First off, it's easy to sit back while doing this move, letting your hip flexors do much of the work. Second, if you keep a flat back, it limits the degree to which you can hit the upper abdominals—your back has to round! And finally, your hands should stay in the same relative position next to your head for the duration of the set. Letting them drift away on the eccentric and then pulling them back again beside your head brings a lot of shoulder and upper body into the move.
No matter how strong your core is, you aren’t going to see a six-pack if your muscles are hiding behind a big layer of fat, says Jim White, R.D., owner of Jim White Fitness & Nutrition Studios in Virginia. “Each individual is going to be slightly different, but the ideal range of body fat in men is eight to 20 percent,” he says. Get below six percent and you could compromise your health.
The rectus abdominis is the muscle you think of when you think "abs." It's the outermost abdominal muscle, and runs vertically along each side of your abdominal wall. The transverse abdominis is the deepest muscle of the abdominal wall, which means it's closest to your spine, and basically wraps around your torso between your ribs and your hips. The oblique muscles run along the sides of your torso, and there are two sets: internal and external. The internal obliques lie above the transverse abdominis, and then the external obliques are on top of those (they're the most superficial of the bunch). There's also a handful of other smaller muscles in this area—what we call the core—that work to stabilize the spine and allow us to bent and twist and lift without hurting ourselves.
For example, believing that you should eat your pre-workout meal is a great way to procrastinate with your training. What if you worked overtime and you don’t have enough time to eat your pre-workout meal? What if you don’t have enough money to buy supplements? All the items in the above list have the potential to evolve into excuses for procrastinating, or worse, quitting. Just forget about them and only do what matters. This will save you enormous time and willpower that should be spared for the things that actually matter in your quest to get abs.
When you're doing exercises to strengthen these muscles, think of the abs and core as one unit. Even when you do exercises that recruit more of one muscle than the others (for example, side planks that really fire up the obliques), you'll notice that you still have to engage your entire midsection to do them right, which is proof that these muscles are never working completely alone. It's important to show equal love to all of the muscles of the core so that this unit can power itself properly from all angles.
AthleanX — If I were to recommend you ONE channel, this would be it. Don’t watch anything else, just listen to Jeff Cavaliere. His entire approach towards fitness is something that has come to resonate with me. There’s no bulking-cutting nonsense, pure focus on form, getting the maximum out of each exercise and a lifelong approach towards good, sustainable nutrition. If I wanted a few exercises to target a particular muscle group, this is where I go to first, learn them, try them out in the gym and invariably get results. There’s a ton I’ve learnt from Jeff and couldn’t thank him enough.
Kneel on a mat on all fours with your hands directly under your shoulders. Stretch your legs back one at a time to come into plank position (the “up” part of a push-up); engage your ab muscles. Your body should be long and straight; don’t let your hips sag or lift your butt too high. Imagine there’s a seat belt tightening around your waist, drawing your lower-ab muscles inward.
“For me, getting a six-pack was about paying attention to what I was eating and lifting heavy weights at CrossFit. I do have a semi-strict diet, and I loosely count macros (focusing on daily carbs, protein, and fat intake rather than blindly counting calories) to stay balanced and on track. It sounds like a lot of work, but it really isn’t. Eventually, it just became a part of my lifestyle, and it’s something I enjoy doing. I even started a custom meal-plan business based on macros because I had such great results!” —Tina Haupert, @carrotsncake