https://www.nestacertified.com/group-fitness-instructor/

Group Exercise Instructors change people’s lives through fitness reaching millions of people every year. A Group Exercise Instructor certification is the primary foundation for teaching a diverse variety of exercise classes. Even if your potential or current employer has it’s own internal fitness education program or certification, in order to be marketable everywhere on your own, you’re going to have to get certified by a nationally recognized fitness organization. NESTA Group Exercise Certification is affordable, accepted, online and comes with a complete business and career training system at no cost.