Popsugar Health & Fitness Workouts What Are the Best Ab Exercises? These Are the 40 Most Effective Ab Exercises to Sculpt Your 6-Pack 20 June 2018 by Jenny Sugar View On One Page Photo 19 of 41 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 19 Crunchy Frog Begin sitting, balanced just behind your sits bones, and rock back slightly to lift your feet off the floor; gently pull your knees to your chest. Exhale, pull your navel to your spine, and lean back slightly as you open your arms to the sides and straighten your legs. Inhale and return to the starting position to complete one rep. Previous Next Start Slideshow WorkoutsAb Exercises