Dumbbell Hammer Curl, alternating

Main working muscle group: Biceps

Secondary working muscle group(s): Forearms

Do

• Keep your chest up and your elbows braced at your sides
• Pull the dumbbells toward your chest while keeping your wrists relaxed

Avoid

• Losing the tension from the biceps by pulling the dumbbells all the way to the top of your chest
• Swinging your body