Popsugar Health & Fitness Dumbbell Exercises 21-Day Arm Challenge Sculpt and Strengthen Your Arms With This 3-Week Dumbbell Challenge 8 April 2022 by Jenny Sugar View On One Page Photo 1 of 6 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 21-Day Arm Challenge Exercise 1: Hammer Curl Stand with your feet hip-distance apart, holding a dumbbell in each hand at the sides of your body. Keeping your elbows close to your ribs, bend your elbows and slowly raise the dumbbells to your shoulders. Moving with control, lower back to the starting position. This counts as one rep. Previous Next Start Slideshow Dumbbell ExercisesArm WorkoutsArm ExercisesFitness ChallengesStrength TrainingWorkouts