Performing the: A Step-by-Step Tutorial Dumbbell One Arm Fly on Exercise Ball
Slowly roll down the ball, shifting your body weight onto your shoulders and upper back while keeping your feet flat on the floor and your knees bent at a 90-degree angle.
Extend the arm holding the dumbbell straight above your chest, keeping the other hand on your hip or on the ball for balance.
Slowly lower the dumbbell in a wide arc until it is level with your chest, keeping your arm slightly bent.
Lift the dumbbell back to the starting position in the same wide arc, squeezing your chest muscles as you do this. Repeat for the desired number of repetitions before switching to the other arm.