Popsugar Health & Fitness Dumbbell Exercises How Do I Work My Arms With Dumbbells? Grab Your Dumbbells — These Exercises Will Tone, Shape, and Strengthen Your Arms 19 January 2019 by Susi May View On One Page Photo 15 of 20 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 15 Overhead Triceps Extensions This is a challenging way to work your triceps, and it fires up your core a bit too. Stand with your feet hip-distance apart. Hold one dumbbell (go for your heavier weight) with both hands, bending your elbows behind your head. Straighten your arms to lift the dumbbell into the air, then slowly bend your arms to lower. This counts as one rep. Previous Next Start Slideshow Dumbbell ExercisesArm ExercisesWorkouts