Aaron Mattes' Active Isolated Stretching Author:Aaron L. Mattes Aaron Mattes' Active Isolated Stretching Book incorporates Active Isolated Stretching and shows you how to stretch the human body. Aaron Mattes' methods allow you to stretch systematically allowing you to reach maximum flexibility. Aaron is the creator of Active Isolated Stretching (AIS) and has spent the last 40 years prefecting these technique... more »s. This book will not only teach you how to properly stretch yourself using AIS, but also how to work with someone else (patient or client) teaching them how to become more flexible.« less