Book excerpt: In Ba Gua Circle Walking Nei Gong: The Meridian Opening Palms of Ba Gua Zhang, author Tom Bisio details the practice method and theory of this powerful system of internal exercise. The postures, alignments and practice methods are clearly explained and correlated with practical discussions of meridian pathways and pathologies from the perspective of internal Nei Gong practice. These discussions are accompanied by extensive illustrations, including drawings rendered from photographs of famous Ba Gua masters holding the Nei Gong postures. Also included are medical applications of Ba Gua Circle Walking Nei Gong and an introduction to the rarely taught Ba Gua Energy Accepting Palm, in which vital force (qi) is absorbed from the natural environment.