Review on Blue AppleRound Air Stability Wobble Cushion With Pump - 34Cm /13.5In Diameter - Ideal For Balance, Sensory Stimulation And Active Sitting by Ricardo Thotti

I don't really have issues with balance but decided at age 68 that I should do preventive maintenance to make sure I stay ahead of the game. I have size 11 feet and this disk just isn't really that easy to manage with feet that size, which is why I gave it 4 stars.I would prefer a rectangular or square shape. It's a challenge to balance on this but I will continue trying. The one advantage I did find was that when I am watching 3 college football games in a day, it helps my spine and my hips if I sit on the short spike side on the sofa. It really helps. I didn't have any problems inflating the disk or having it remain inflated.