This article is from the Aerobics Fitness FAQ, by firstname.lastname@example.org (Robles) with numerous contributions by others.
In the time since the dawn of aerobics, when people still exercised
in bare feet, drawing from dance classes, and having soaring injury
rates the industry has grown up, gotten educated, and as a whole
approaches exercise very differently.
While certification is required to work at the majority of clubs
these days, that alone should not be a reason to obtain one.
Preparation for any of the major certifying bodies' exams will
require the candidate to grasp the fundamentals of the exercise
sciences - anatomy, kinesiology, physiology. In addition, the
latest research and trends in exercise testing and programming will
be covered, and the standards and guidelines for exercise for
different populations will be discussed.
We know a lot more about group and individual exercise now than we
did ten years ago, and a lot more is expected of today's instructors
than to look fit and know a bunch of exercises and choreography.