Joseph Pilates designed spring based equipment to support and advance the body while practicing the Pilates method of exercising. The movements that we do during mat work and while using the equipment are very similiar. The springs of the equipment are often referred to as extra muscles, or an extention of the body. They allow the body to experience a movement that they maybe could not do otherwise. They help teach the body how to move properly so that it can repeat that movement in other situations.