The Best Dumbbell Arm Exercises For a Stronger Upper Body, ASAP

This dumbbell arm exercise targets your lateral deltoid (the muscle on the side of your shoulder), which is often overlooked, says Sherika Holmes, NASM-certified personal trainer.

1. Stand with your feet hip-width apart. Hold a dumbbell in each hand so your palms face backwards.
2. With control, keep your arms straight (but not locked at the elbow) and raise both hands up and out in front of you. Keep your palms facing down stop when your arms are parallel to the floor. Then, bring your arms out to the sides, still raised. Keep your core engaged and back flat.
3. Slowly lower the weights to return to the starting position. That's one rep.
4. Try 2-3 sets of 10-12 reps.