Begin by sitting on the ball with the dumbells resting on your thighs
Slowly walk your feet forwards until your shoulders and head are resting comfortably on the ball
Ensure that your bum is raised so there is a straight line through your body from knees to shoulders
Begin with the dumbells just above your shoulders with your elbows out to the side
Now slowly raise the dumbells into the air until your arms are almost straight, the dumbells should touch at the top
Using control, bring the dumbells back towards the shoulders
Repeat steps 4 to 6 until you can no longer maintain correct technique
Tips
This exercise should ALWAYS be performed under control, be sure to raise and lower them slowly, ideally 2 seconds up and another 2 seconds to come down
If you are new to the FItball, try getting into position a couple times without the dumbells until you feel comfortable