Circle Walking/ Turning a Circle, when done as a solo practice with the intent of just walking in one direction for as long as you can, then quickly changing directions, and again walking in the opposite direction, is an internal practice that adheres to the theories of 易筋 'Yi Jin' (Changing the Tendons) and 洗髓 'Xi Sui' (Washing the Bone Marrow). It's a practice that merges the building up of the internal functioning of the body with building up of the strengths and flexibility required when using martial skills/ fighting.
It's called 行桩 'Xing Zhuang' (Moving Standing) practice method it takes the 站桩'Zhan Zhuang' (Static Standing) practices to another level of development as it moves more energy and blood around the body and accomplishes the more refined levels of mental and physical development in a more timely manner, and without other extracurricular Qigong practices.
