Ball Dumbbell Concentration Curl Show Video Show All Exercises     Primary Muscle Group: Biceps Muscle Groups Worked in This Exercise: Bicep Preparation: Kneel on one knee and place one arm over the stability ball. Your tricep should be resting against the ball. Breathing: Breath out on the contraction and curling of your bicep Execution: Curl the dumbbell up and then extend until your arm is almost completely extended. Stop just short of locking out your elbow. Repeat for the prescribed reps and then repeat with the other arm. Here are a few suggested alternative exercises: Ball Band Biceps Curl Band Curls Barbell Curl EZ Bar Curl EZ Bar Reverse Curl