Woman working out with exercise ball in gym. Pilates woman doing exercises in the gym workout room with fitness ball Stock Photo - Alamy
Best Mini Exercise Balls
Amazon.com: Exercise Ball Small, 6 inch Core Ball for Pilates with Pump, 6 in Barre Ball, 6" Stability Ball Mini Yoga Ball for Women Workout Fitness Physical Therapy PT, Blue : Sports
How To Use The Stability Ball for Pilates - Complete Pilates