Popsugar Health & Fitness Injury Prevention Exercises With 1 Dumbbell All You Need Is 1 Dumbbell For These 20 Intense, Muscle-Building Moves 25 June 2018 by Jenny Sugar View On One Page Photo 20 of 20 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 20 Single-Arm Chest Press Working one arm at a time makes the core work more to stabilize your torso while you work your chest. Lie on your back with your heels about a foot away from your butt. Hold a dumbbell in your left hand and bring both hands to the ceiling. Bend your left elbow, lowering your upper arm to floor. Exhale and straighten your elbow, pressing the weight back to the ceiling to complete a rep. Perform the same number of reps on each side. Previous Next Start Slideshow Injury PreventionArm ExercisesButt ExercisesStrength TrainingWorkoutsAb Exercises