Performing the: A Step-by-Step Tutorial Dumbbell One Leg Fly on Exercise Ball
Carefully walk your feet forward, allowing the ball to roll underneath your body until only your upper back and shoulders are supported by the ball.
Lift one leg from the floor and extend it straight out, keeping your balance on the other foot and the exercise ball.
Hold the dumbbells out to your sides so your body forms a T shape, then slowly bring them up above your chest, keeping a slight bend in your elbows.
Lower the dumbbells back down to your sides in a controlled manner, then repeat the movement for your desired number of repetitions before switching to the other leg.