Why it made the list: Yes, a leg exercise made the top 10 list for abs. Anyone who has ever pushed their potential in the squat knows exactly why! Sure, squat variations work the legs and lower back, but they also crush the abs. Both front and back squats force your abs and spinal erectors to work overtime to maintain a neutral, upright position. If both were not firing at high rates, you'd fold under the weight or drop in a split second.
“These days, I do a fair amount of Pilates and yoga to focus on the strength of my core. You don’t have to be a crazy cardio bunny to lower your body fat percentage (to get those abs to show)—bodyweight exercises can be really effective. Yoga and Pilates help me focus on overall strength, not just my core, and it helps make sure I work my back, too. Most people forget about that, but you need a strong back to help support a strong core.” —Dorothy Beal, @mileposts
Why it made the list: Decline-bench crunches amp up the challenge by increasing the range of motion over standard crunches, and you can dial up (or down) the degree of difficulty by adjusting the angle of the bench. Adding a medicine ball or weight plate against your chest adds a further level of customizable resistance. This also allows you to manipulate where you want to fail: low, medium, or high reps.
Lie on your back with knees bent to 90-degree angles. Straighten your arms by your sides, and lengthen your fingertips. Press the backs of your shoulders against a mat, and slide them down away from your ears. Focusing on the deep waist muscles, inhale and slowly move your knees to the right, then exhale and return to starting position. Repeat on the left; that’s 1 rep. Do 5–8 reps.
The long arm crunch is ranked the 6th most effective ab exercise, changing the traditional floor crunch by straightening the arms behind you. This adds a longer lever to the move, adding a bit more challenge and difficulty. This move also emphasizes the upper part of the abs, although it's important to remember that your rectus abdominis is actually one long muscle that travels from your lower chest to your pelvis. While you can emphasize one part, any exercise you do will work the entire muscle.
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.