Pilates is a method of exercise and physical movement designed to stretch, strengthen, and balance the body. Classical Pilates teaches the exercises taught by founder Joseph Pilates, in the order that he taught them and the names he referred to them. Romana, one of Joseph Pilates disciples, organized the exercises into levels or systems to make the method more accessible; Beginner, Intermediate, and Advanced. The levels build on each other. The same exercise may be taught at each level in the same order in a more challenging way, while new exercises are added. The progression of a workout starts in a horizontal position lying down, where gravity helps activate the core connection and progresses to a vertical sitting or standing. The Classical method centers on the 6 principles of Pilates: Centering, Concentration, Control, Precision, Breath, and Flow. The method incorporates more than 500 controlled precise movements created by Joseph Pilates.