Seated on a stability ball, with back straight and feet flat on the floor in front of
you.
Grasp a dumbbell in each hand with palms facing each other. Hands fully extended at
your sides.
One arm at a time, curl the weight up keeping your elbow close at your side. Twist
your wrist at the top of the movement until your palms are facing you.
Hold and contract for 1-2 seconds, then lower and repeat with opposite arm.
Tips
Do not swing the weight up. Choose a weight that you can handle with proper
form.