Popsugar Health & Fitness Workouts Best Crunch Variations Add These 20 Crunch Variations to Your Routine and Chiseled Abs Are on Their Way! 5 August 2018 by Jenny Sugar View On One Page Photo 5 of 20 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Reverse Crunch Lying on your back, lift your legs in the air with your knees bent. Place your hands on the floor beside you. Without momentum, use your lower abs to slowly curl the hips off the floor and into your chest. Slowly lower them back to the starting position. This counts as one rep. Previous Next Start Slideshow WorkoutsAb Exercises