One Arm Bicep Concentration on Stability Ball with Dumbbell· Grasp a dumbbell in one hand and sit on a Stability Ball with your feet wide apart.
· Bend forward leaning at the waist.
· With the dumbbell in your hand, place your elbow against your knee.
· Lower your arm so it is flat against your calves.
· Curl your arm up to your chest keeping your elbow steady.
· Return to starting position and change hands.
Download Gym Hero to start a routine