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 21 of 30 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 21 Elbow Plank With Knee Drive Start in an elbow plank and bring your right knee into your nose; your pelvis will rise toward the ceiling. Place your right foot back on the ground. Alternate sides, bringing your left knee in. This counts as one rep. Previous Next Start Slideshow Arm ExercisesWorkoutsAb Exercises