Fitness topics may also include
nutrition,
weight-loss, and
self-help. Fitness careers are distinguished from
exercise science careers such as
athletic training, however the various types of fitness
certifications have more and more in common: the, "distinctions...have become blurred, with more similarities than differences given the common background that all fitness professionals must possess." Fitness professionals screen participants for
exercise programs, evaluate various
fitness components,
prescribe exercise to improve these components, and may also help clients with specific or chronic conditions. Notable fitness professionals or former fitness professionals include
Richard Simmons,
Susan Powter,
John Sitaras and Gov.
Arnold Schwarzenegger (''
Arnold Schwarzenegger's Total Body Workout''). Certified fitness professionals must remain up-to-date on all certifications in order to instruct at particular health clubs and gyms. Often, fitness professionals will have some education in
kinesiology, anatomy, and
biomechanics to aid in their fitness career. In Canada, Canadian Fitness Education Services (CFES) provides national fitness leadership program modules to take candidates through the steps in Aquafit, Group Fitness and/or Weight Training Instructor and Personal Trainer national certification. == Coaches ==