Pilates is a physical fitness system developed in the early 20th century by Joseph Pilates and popular in Germany, the UK and the US. As of 2005, there were 11 million people practicing the discipline regularly and 14,000 instructors in the United States alone.
The most widely used piece of apparatus, and probably the most important, is the Reformer, but other apparatus used in a traditional Pilates studio include the Cadillac (also called the Trapeze Table), the high (or electric) chair, the Wunda Chair, the baby Chair, and the Ladder Barrel, the Spine Corrector (Step Barrel) and small barrel. Lesser used apparati include the Magic Circle, Guillotine Tower, the Pedi-Pole, and the Foot Corrector.