Why it made the list: There are many reasons to like leg raise variations, but one is their scalability. You can start doing bent knee raises in the Roman chair or ab straps to focus on the lower core, work up to straight leg raises, and then move to a hanging bar. By the time you can do full straight-leg toes-to-bar raises, your entire core will have strength for days.
Why it made the list: This harder version of the Russian twist works the obliques while requiring the upper abs to contract isometrically. To recruit the obliques, you either need lateral flexion (bending to your side), trunk rotation (twisting), or sucking in your belly. Doing your twists works the trunk-rotation function of the muscle, so really focus on the contraction. Try to get a little crunch on either side after the rotation to up the ante.
“A silly thing I do on a daily basis is focus on sitting or standing tall with good posture and then ‘sucking it in,’ for lack of a better term. Basically, I tighten my core and hold onto it for as long as I can, and I keep doing that throughout the day. It’s a great way to not feel like a lump while sitting in front of a computer for a long period of time, and it’s like a bonus workout for my abs.” —Dorothy Beal, @mileposts
I train 6 times a week with the only goal of getting stronger, lifting heavier and beating my previous records. I aggressively subscribe to the concept of progressive overload where you constantly challenge yourself by increasing volume, intensity, weight or a combination of those 3. This is the only way to continue building lean muscle as someone natural (one who does not consume anabolic steroids or enhancement drugs). I keep notes on how heavy I hit an exercise previously and new exercises I would like to incorporate for each muscle group.
"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
How to: Start on the floor on your hands and knees. Lower your forearms to the floor with elbows positioned under your shoulders and your hands shoulder-width apart. Your arms should form a 90-degree angle. Maintain a straight line from heels through the top of your head, looking down at the floor, with gaze slightly in front of your face. Tighten your abs and hold. Do 15 reps.
“The bird dog forces you to keep your core stiff,” says Jack. “Lifting your knees off the ground just a couple of inches—as you do in this exercise—makes it even more challenging to keep your torso still as you switch arms and legs.” That means your hips and lower-back muscles, obliques, rectus abdominis (also known as the six-pack muscles) are working together to keep your spine stable.
A cross between a leg raise and a crunch, the V-up is championed by personal trainers and #fitspo influencers alike. It hits both the top and bottom sections of your ab muscles, granting definition in those hard-to-hit spots. Here’s how to do it. Lay flat on the ground, arms raised over your head. Raise your legs, keeping them straight, toward the ceiling. At the same time, try to touch your toes. (You don’t have to fully get there.) Return back to a flat position. That’s one rep. Do as many as you can. Once you can effortlessly do four reps of fifteen, start adding a medicine ball for increased resistance.
Refresh your abs workout with these 25 core exercises. They'll challenge your abs from all angles, making you stronger in everything you do and giving you a body you'll be proud to show off shirtless. And for a complete fitness program that will not only build your abs muscles, but also melt the fat that covers them, try Anarchy Abs from Men's Health. You’ll get five 30-minute calorie-torching workouts that employ a unique blend of metabolic training, traditional strength training, and gymnastics fundamentals to strip away fat from head to toe.