Popsugar Health & Fitness Arm Exercises Best Arm Exercises If Today Is Arm Day, Here Are 59 of the Most Effective Moves You Can Do 21 March 2018 by Jenny Sugar View On One Page Photo 19 of 59 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 19 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. Previous Next Start Slideshow Arm ExercisesStrength TrainingWorkouts