Popsugar Health & Fitness Workouts What Are the Best Dumbbell Arm Exercises? Grab a Pair of Dumbbells — These Are the Best Moves For Strong, Defined Arm Muscles 24 January 2019 by Jenny Sugar View On One Page Photo 21 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 21 The Bicep and Deltoid Squeeze Sit cross-legged on the floor, or stand, and hold a dumbbell in each hand. Hold your arms out wide, elbows bent at 90 degrees, relaxing your shoulders away from your ears. Rotate your arms so your elbows are moving to meet each other in front of your face. Keep your muscles engaged, and move back to starting position to complete the rep. Previous Next Start Slideshow Workouts