Popsugar Health & Fitness Arm Exercises Best Exercises For Toned Arms Change the Shape of Your Arms With These 50 Essential Moves 24 May 2018 by Jenny Sugar View On One Page Photo 21 of 52 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 21 Up-Down Plank Begin in a full plank. Lower your right elbow to the mat and then your left, coming into an elbow plank. Put your right hand on the mat, and straighten your right elbow. Do the same on the left to return to a full plank. This completes one rep. Previous Next Start Slideshow Arm ExercisesWorkouts