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 9 of 30 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 Spiderman Plank (aka Creepy Crawler) In plank, bring your knee to your elbow and then alternate sides. This counts as one rep. If this is too challenging, just lift your leg open to the side. Previous Next Start Slideshow Arm ExercisesWorkoutsAb Exercises