Popsugar Fitness Workouts Plank Exercises For Abs For a Leaner Belly, These 35 Plank Variations Are a Must (Plus 1 Bonus Video!) August 15, 2018 by Jenny Sugar View On One Page Photo 10 of 37 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 10 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 WorkoutsPlankArm ExercisesAb Exercises