Arm strength involves many factors … Time: 15 minutes Equipment: Dumbbells Good for: Arm-toning Instructions: For a full arm workout, choose six moves from list below and do 12 reps of each, then continue to the next … Dumbbells make for a more challenging and engaging workout. Verywell / Ben Goldstein. The ol' bicep curl can be performed with dumbbells… 7 Top Dumbbell Arm Exercises to Build Muscle for CrossFit Athletes Try these exercises to build muscle and work towards RXd arm-focused workouts. You can do 8 bench press reps with a 200-pound barbell while with dumbbell … This dumbbell arm workout was designed to help you reach your fitness goals by squeezing in a short burst of exercise throughout your day. Dumbbells are much more flexible rather free-form, so you use more muscle to support the weight compared to barbells. The three exercises in this arms workout with dumbbells struck both heads of your arms, and, thanks to modifications in grip, you’ll hit them from various angles too. There’s likewise an abdominal muscle component, considering that the initial workout… You can do it alone or combine it with other targeted toning … Perhaps the best-known dumbbell exercise, it's certainly the most common, the curl is a classic "isolation exercise," which means that it isolates one muscle or one group of muscles.This is the opposite of a "compound exercise," like the bench press or the squat, which works out multiple muscle groups at once..