Dr. Thomas Michaud is the author of Human Locomotion: The Conservative Management of Gait-Related Disorders, the content of which forms the basis for this and subsequent articles. All illustrations in this article appear in the book and are reproduced with permission. Dr. Michaud is a 1982 graduate of Western States Chiropractic College and practices in Newton, Mass., where he has treated thousands of recreational and elite runners. His first textbook, Foot Orthoses and Other Forms of Conservative Foot Care (published in 1993), was eventually translated into four languages and is used in physical therapy, chiropractic, pedorthic and podiatry schools worldwide.

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