Book excerpt: Developed over many centuries, Tai Chi Chuan incorporates the principles of Taoist philosophy with the accumulated knowledge of the traditional martial arts. Wu Style is known as the "three-in-one exercise," invigorating the mind, the internal energy (qi), and the body. Wu Style Tai Chi Chuan describes the origin and philosophy of Tai Chi Chuan, and then details its multiple health benefits. Step-by-step instruction in the practice of the Tai Chi Chuan solo form is presented.