This third edition is now in three distinct parts for ease of use and greater clarity. The first section "A Theoretical Approach" summarises the Chinese physiological theory of vital energy that underlies Chi Kung and then goes on to provide a Western physiological understanding of its mechanisms and how it benefits health. To counter the mystique which often surrounds this ancient practice, the authors avoid the heavily esoteric or pseudo-scientific approach of some current explanations. The second section "A Practical Approach" offers some basic Chi Kung warm up exercises suitable to highlight the previous theory in a practical way. The simple exercises can provide a short but useful daily routine. Section three "A Scientific / Evidence-Based Approach" examines the traditional understanding of Chi Kung and its benefits in light of analysis of scientific research into the theory and efficacy of Chi Kung.The text provides a useful reference for beginners and experienced practitioners of Chi Kung, teachers and health professionals.