This book is an essential for all new and existing Aqua Exercise teachers. It offers easy to read theories behind the properties of water and how these relate to the planning and teaching of exercise in water. As a Trainer of teachers in Aquatic Exercise I found this book to be an informative and inspirational guide to a variety of ways to make Aqua exercise fun and effective for a wide variety of class participants. Debbie writes theoretical Material in an easy to understand way and I have found that all the students who have purchased this book have been delighted with its content.