Find the various organizations that certify fitness instructors. The American Council on Exercise (ACE), Aerobics and Fitness Association of America (AFAA) and the American College of Sports Medicine (ACSM) are the three top credentialed organizations. Chose the one that fits your needs the best.
Get your CPR/AED certification. This is a requirement for every organization. The American Red Cross and American Heart Association offer classes on a regular basis in every part of the country.
Purchase the study materials for the certification of your choice. All three organizations have study materials to help to pass the test. It is highly recommended that you have these materials and study them. All of them will include a practice examination. Anatomy, kinesiology, exercise physiology and class techniques such as cuing, class design, injury prevention and music are all covered in the study material. Take the time to learn the information in the study materials. Practice teaching a class at home if you have never taught before.
Take the certifying examination. A certifying exam will have both a written and practical exam. The written exam will cover areas such as knowledge of anatomy, movement of the body, various exercises and how to prevent injury. It will also cover how to instruct a class, class design and dealing with the students in the class. The practical exam is the opportunity for you to demonstrate your ability and knowledge of various parts of a class, from warm up to cool down and a variety of exercise options for various body parts.
Maintain your certification. After you have passed the exam and become a certified fitness instructor, each organization requires that you to continue your education by taking classes and workshops.Certifications are renewed every two years.