Book excerpt: ACE Group Fitness Instructor Manual was designed to prepare fitness professionals to work in group and class settings and is the main study for the ACE Group Fitness Instructor. Developed and written by 17 of the industry's top experts, the ACE Group Fitness Instructor Manual is an excellent resource, addressing the core competencies you need regardless of the types of classes you teach. It provides overviews of nine of the most popular modalities, including aquatic exercise, fitness yoga, and Pilates mat training. Topics range from exercise physiology, anatomy, kinesiology, and health screening to adherence, injury prevention, and legal and professional responsibilities. Special attention has been given to fitness for special populations, including pregnant women and those with significant weight challenges. Companion DVD included.