Review on CDCASA Balance Ball Balance Trainer, 23" Half Ball With Resistant Band, 4MM Thickened PVC, Weight: 660 Lbs, Yoga Strength Exercise Fitness With Bonus Foot Pump, For Core Training Home Workout by Ashwin Patel

This is making working out fun and giving me an even better work out. Just when I think I have my full balance on it I start to lose balance and struggle to get it back. Not only do I laugh the entire time but I'm working muscles that normally dont get worked. I feel the soreness in my back, legs and core from using this when doing arm workouts. Pretty darn cool. Dont even feel like a work out, just seems like your messing around while working out. Just what I needed to stick to it and get way more from an arm work out.