|In the constantly evolving world of fitness and exercise, it is challenging to become.and remain.an effective group exercise instructor. Methods of Group Exercise Instruction, Fourth Edition With Online Video, offers expert guidance in a variety of group exercise formats so current and aspiring instructors can hone their skills and create demand for their services. The authors.who have dozens of years of experience.thoroughly explain group exercise training principles, correction and progression techniques, and safety tips. They also have taught this course within a university setting. This research-based text will enhance the skills of group exercise leaders and prepare them to lead more dynamic, safe, and effective classes for clients of differing ages, abilities, and interests.