This manual is an essential tool for the Group Fitness Instructor Certification Exam preparation and a complete on-the-job resource. Includes a companion DVD on group fitness modalities. 2nd ed. 2008, 453 pgs.
I learned a lot from this book, in the course of studying for my group fitness instructor certification! In particular, I liked how the authors teach how to design movements with modifications for different ability levels, pre-existing diseases, pregnancy, and other circumstances.