For a DB alternating bicep curl -- seated; settle down on a stability ball with a tall torso and your knees making a 90 degree angle. Grab a pair of dumbbells in both hands, and keep your elbows in tacked at all times. Using your forearms lift the dumbbell in your right hand, while bring your right hand down lift your left hand up. And keep doing so for completing a DB alternating bicep curl -- seated.
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