Bagua is an internal martial art using circle walking, or "turning the circle", as it is sometimes called, circle walking is baguazhang's characteristic method of stance and movement training. The form of baguazhang utilize circle walking prevalently as an integral part of training. Students walk around the edge of the circle in various low stances, facing the center, and periodically change direction as they execute forms. For a beginner the circle is six to twelve feet in diameter. Students first learn flexibility and proper body alignment through the basic exercises, then move on to more complex forms and internal power mechanics. Although the internal aspects of baguazhang are similar to those of hsing I and tai chi chuan, they are distinct in nature.