Popsugar Health & Fitness Workouts Exercises For Abs Your Flat Abs Are on Their Way If You Do These 50+ Core-Carving Moves 13 August 2018 by Jenny Sugar View On One Page Photo 51 of 55 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 51 Side-Plank Crunch This move is definitely advanced, but you can modify by bringing your bottom knee to ground in a kneeling position. Begin in a side elbow plank with your left elbow down and your right hand behind your head. Keeping your torso stable and your waist lifted, bring your right leg up toward your shoulder to lightly tap your right elbow. Lengthen your right leg back to the starting position to complete one rep. Previous Next Start Slideshow WorkoutsAb Exercises