Kiddy K. | 
05 7th, 2009| 
Exercise balls, also known as fitness balls and Swiss balls, are big balls, 55cm – 75cm, that are used in all kinds of fitness scenarios from physical therapy to yoga, Pilates, and general exercise.
Exercise balls were certainly not invented by Joseph Pilates and they are not considered traditional Pilates equipment in the way that magic circles or reformers are. Nevertheless, the fitness ball has been heartily embraced by much of the Pilates community.
