Theresa Ruggles | Pilates Instructor on Instagram: "In my classes this week I gave two options: the easier version is to keep the hands by your sides, down on the carriage to help you find stability on the ball (great option for a client with less core strength who is more likely to roll off the ball). The second option is what you see in the video here with the hands in the air which is much more challenging on lumbopelvic stability. Preferably the ball should be partially deflated, but not all