Gait analysis is the systematic study of human walking. It is used for diagnosis and the planning of treatment in people with medical conditions that affect the way they walk. Over the last few years, increasing numbers of patients have benefited from the use of gait analysis by their doctors and physical therapists. Most of the literature in this field is highly specialized and very technical. This book, however, aims to brings gait analysis out of the 'ivory tower' of the research laboratory, and to put it where it belongs, in the 'real world' of the clinic. The author has maintained the clear and approachable style that established the first three editions of Gait Analysis: an Introduction as the premier introductory textbook on the subject. The book aims to demystify the subject of gait analysis, and it will continue to be essential reading for students and practitioners of physical therapy, orthopaedics, neurology, rheumatology, rehabilitation, bioengineering, and indeed all those involved in the study of human movement. Dr. Michael Whittle holds the Walter M. Cline Chair of Excellence in Rehabilitation Technology in the University of Tennessee at Chattanooga, and has honorary appointments as Professor of Orthopaedic Surgery and Professor of Physical Medicine and Rehabilitation in the University of Tennessee College of Medicine. He is a qualified doctor, and has degrees in physiology and biomedical engineering. He has spent over 25 years running gait analysis laboratories in the University of Oxford, England, and the University of Tennessee. He previously worked as principle coordinating scientist for the musculoskeletal experiments on NASA's Skylab space station.