How can I modify exercise to reduce injuries? What are the best ways to monitor exercise intensity? What is the most effective class design for weight loss? You'll find the answers to these and many other questions inside this book - the most definitive text ever written for the professional aerobic dance-exercise instructor. Twenty-one expert authors and 31 reviewers have compiled the most up-to-date information currently available. Fully illustrated chapters on anatomy and kinesiology, exercise physiology, and nutrition provide a solid knowledge base for important information on injury prevention, health screening, pregnancy and exercise, and emergency procedures, and much more. Both beginning and experienced instructors will benefit from this comprehensive text.