Popsugar Health & Fitness Arm Exercises Best Plank Variations This Is the Ultimate Move For Sculpting Arms and Abs — Try These 30 Variations 26 July 2018 by Jenny Sugar View On One Page Photo 27 of 30 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 27 Side-Plank Crunch 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. Be sure to perform a set on both sides. Previous Next Start Slideshow Arm ExercisesWorkoutsAb Exercises